The gimbal can be used in more ways, and you can always attach it to something that rolls and have your dolly as well.
But I try to avoid gimmicks and hand-held or steadicam shots, and rather compose a relatively “static” frame and just let things happen within it, staging the action and using actor movement in depth, not unlike theater or soap opera work.
I add the illusion of motion to my relatively static frames, when needed, by sometimes making the editing take a more kinetic pace. Or I will do slow pans or zooms where dolly moves or slider moves are more today’s fashion.
It’s a style I “grew up in” because all my work has always been relatively low- budget and so I had to make-do with what I did have, or could bodge together. In 30 years of shooting I’ve only rented a Chapman doorway dolly twice (sans track) and a jib maybe three times. But I’ve done things like suspend a camera from a wooden board to get vertical shots, or clamp a hi-hat to the top of a tall stepladder instead of a jib or crane, Or make a pintle mount for the bucket on a utility company bucket truck. Or make a bean bag with a strap for my knee, for shooting out the doorway of a JetRanger or Blackhawk. Or strap a lipstick cam to the pilot-streerable “night sun” spotlight under a chopper…Or strap cameras to cars in various ways. Yes, I did the “camera in a fishtank” thing to shoot underwater once. Worked great.
These days a favorite trick of mine is to shoot 4K or better and do re-frames, synthetic dollies and buttery-smooth sloooooow zooms in post.
One fun one, I can still use today to mimic drone shots: a 30-foot length of PVC with a lipstick camera on one end and the battery pack, Casio 4-inch LCD monitor at the other, for balance. Connected to a portable Betacam deck. Looked like a Surf-fishing outfit at a distance, but I got great high-angle b-roll of state fair carnival rides and the like, as well as being able to poke it thru a crash fence and get worm’s-eye views of sprint cars on the dirt oval. Very cool look. Today I’d “pole-cam” with a go-pro or gimballed Osmo, and Bluetooth monitoring. You kidz gots it all too easy today, yadda-yadda-yadda…
As to your dolly, lots of things can be used as makeshift dollies; wheelchairs are pretty common and easy to get at garage sales or thrift stores… but did you know a 10-speed bicycle makes a pretty good all-terrain, indoor/outdoor dolly too? Replace the seat post with straight tubing and put your hi-hat or Osmo on that. You may have to replace the back wheel with another front wheel to avoid the gear clicking. But half-wrecked 10-speeds are practically free at the “Sally”.
It adds to my fun when I come up with stuff like that and it works; the surprise reaction of folks who think I used something expensive is a hoot.