With so many unknowns, you need the flexibility of charging an hourly rate, and not a fixed price. With a fixed price quote you will either lowball and miss out some profit, making it harder to charge more later, or you will run into a snag and wind up working very hard to make deadline, but dividing the fixed price into the hours, you’ll be making minimum wage, if that. Either way you lose.
Resist the temptation to commoditize creative endeavors like they were widgets on an assembly line. You are an artisan, not a line assembly worker. It takes as long as it takes, and it costs what it costs. I’m not asking you to act pretentious. It’s being realistic and professional. Even a prosaic business video has many creative challenges within it if it’s to be successful. They are paying you to do this because you have the skills and judgement to deliver the product they want, and they have to trust that judgement. To give the customer a comfort level, you can set out general limits, but that’s all.
So much of this depends on just how prepared the project is when it comes to you, and if every issue has been signed off and approved in advance. I’ve had these things go exceptionally well, and I’ve seen them turn to horror shows starring myself as the victim. If you have a treatment, a real script, real logged tape that’s shot correctly, lists of correctly spelled names, title,s and other edit-ready graphic elements, etc etc. and it’s all approved, you can cruise along pretty fast. If it’s scribbles on a cocktail napkin, a shoebox of unlabeled mixed-format tape with messed up sound, wrong color balance, shakey shots of bad presenters and 32 10-line powerpoint screens in 3-point green seriffed type over neon blue…. it’s going to take some time, bro. Especially if a meddling middle manager keeps asking for changes or additions. Would you really want to be locked into a fixed rate to handle a mess like THAT?
Suggest and stick to a minimum hourly rate, you can make estimates on how long each step *should* take, but make it clear there is going to be a certain margin either way. Offer a rebate afterwards if it goes exceptionally smoothly and you feel guilty for charging too much. Have the gig structured in thirds: one third up front, second on completion of the rough cut, third on final approval, I find this helps put everyone at ease, and you get paid only for the progress you make, which is fair.
Some editors charge lesser rates to just digitize… I suppose if you don’t need to really sit thru it all during that time to really grasp what you have and log it all, that makes sense. (I would insist on looking at everything if it were me.) OTOH, a system and operator that’s tied up logging can’t be making money editing someone ELSE’s program, so I would think regular rate for “mere” digitizing is also fair.
Finally, if anybody you deal with uses any variation of the phrase:
“cut us a break on this one, and we’ll give you a lot more business down the road”
Leave immediately, check your wallet on the way out, and never go back. You will thank me.