You’ve gotten some good advice here so far.
This guy has already said “the magic words”, regarding the empty promise of future gigs if you give him a break up front. My rule of thumb is to walk away from the negotiation if this phrase ever comes up, because it is an infallible indicator of a swindler and grinder who will cost you more time and trouble than any “profit” you can get out of him. So I would personally refer him elsewhere, like your biggest rival, and be done with it.
But it sounds like you really want to pursue a deal with this guy. And you are right to be exceptionally cautious. Though if you’re counting on the legal system being your only hedge against him, you’re in for disappointments. Guys like this know very well how to game the legal system, appeal and counter-sue and get continuances all along the way, and drag things out till you give up the chase as unprofitable. You know he can do this since he’s just declared bankruptcy. Not that all people who declare bankruptcy are crooks, (it can happen to very honest people with simple bad luck, to bumblers, or entrepreneurials like Trump, who seems to do it every other year so he can leverage billions) but people who do declare and *also* use the “magic words” fit my profile of very likely crooks and liars. To be charitable, he may be a bumbler, too. Also not a good sign you will ever make a profit off him.
So, forge ahead if you must, but always with the principle that each phase of work must be paid off in full before the next is started or delivered. YOU ARE NOT A BANK. Do not allow him to make interest on YOUR money.
Funny its a builder asking you for the estimate; because when people try to pin me to a figure without specs up front, I often ask them what should a house cost, then I describe how a mansion and a tar paper shack both keep the rain off your head, but the difference is in the details, materials, and workmanship. Builders are masters of juggling these factors when THEY make bids.
Looking over the elements of the proposal you touched on, we have a bunch of time-lapse, which could be set up semi-automated with a lot of capital expenditure up front for a mounted camera, enclosure, power, (insurance) etc, or done on a daily visit basis with a digital stills cam and converted to hi-def movie later in post. Doing it that way means you have to go on site every day there is construction, blocking at least part of each day from being used for any other money-making business you want to do. You HAVE to charge something for this “opportunity cost”. it also isn’t “finished” until the very end, so he will want to not pay you until delivery. You cannot afford to allow that. Again, YOU ARE NOT A BANK.
It may be that you can’t come up with a figure for the time-lapse that fits his budget, in which case perhaps a 3-d animation is perhaps a better deal: using photos of the actual components of his buildings for texturing the model, you can throw together a nice simulated time-lapse build of his building in CGI in a fraction of the time, and it has the bonus features of infinitely variable viewpoints, camera moves, and reveals of features, things you culd not do with a conventional time lapse. You have to wait for the real building to be finished with time lapse, not so with animation. The CGI also gets a head start in that you can digitize his construction blueprints or import his CAD files thus avoiding a lot of modeling work. You could go straight to texturing and animating. If you don’t “do” animation, this could be a job you farm out to someone experienced, or you could use it as a way to get paid for learning how to do it yourself. A little risky for you, but a new skill and software you can apply to many other jobs later.
Back to your negotiations. Your builder does not get the right to tell you how few or many people you need for crew. You and your budget and timetable decide that. If you are sure you need more bodies on the job, and there isn’t enough money to do that, then you don’t have a deal. Plain as that. Not the deal he wanted, anyhow; you have to say that that’s just not possible, and try to go on ahead and cme up with other approaches that fit the available resources. Make substitutions.
Sometimes you just will not be able to get to a mutual agreement. You have to be able and willing to walk away from any negotiation or it really isn’t a negotiation. Some jobs just are not worth the cost of trying them. This is not a failure on your part. I heard a lecture from a guy once who worked in CGI/post, back in the 80’s. When asked how to budget and bill, he said he starts the discussion by saying “I don’t even turn on the machine for less than x thousand dollars”.
That’s not hubris or ego; that’s him knowing HIS true costs of doing business, the minimum amount of time and money he needs to make his operating costs and see a profit. If the figure is below this number, he knows he is wasting time and losing money, and the client is either too small or too poor for him to service. He could be more productive running new tutorials to learn some new technique , so he could market himself better, or he could do better spending his time networking, working the phones trying to dig up accounts or just to maintain good relationships with past good clients. Anything that would lead to a positive balance on the accoutning ledger. If he takes the marginal job, he’s unavailable for a better one. Opportunity costs. Very important concept.
I would tell you not to pursue this job, but it is your call. Just be careful, and be ready to walk away at any time unless your minimums are met.