Great site, I’m thinking that’s a good place to look too.

Agree most RC motors are just too fast in direct drive. If you try to throttle back to low RPMs there will likely be much larger current use under load spikes than what you are looking for. The slowest brushless RC motors are typically outrunners, more popular in airplanes, Cars mostly use inrunners. As mentioned look for a very low kv value, rpm per volt.

I think you will likely need to use a geared setup of some kind to get the combination of low rpm, high torque, and low current use though.
Brushed gearmotors here.
Belt drive may help with noise.
Or possibly worm gear drive, I think they are generally fairly quiet.

Don’t know what might be involved in mounting various brushless motors to these deals. Good luck!