It seems to me it would be better to start with what service voltages are already in the building. It would cost a small fortune to bring in a new service or install transformers just to serve some winches. That might make sense to do if the building only has single
phase, but that's a different discussion. By far, the most common service in large buildings is 120/208
Wye. Really big buildings, or those will big motor loads, may have 277/480
wye. 240 delta is less common. There are buildings with multiple service voltages, too.
The nameplate
voltage on a motor typically has a tolerance of +/- 10%. For example, some motors are marked 230 V, even though that isn't a standard service
voltage. That is the manufacturer's way of saying the motor will operate on 207-253 V. Allowances may need to be made on the starting torque with lower
voltage. 220 is also common for 198-242 V.
I believe that the
winch manufacturers can supply their products for any common , three
phase voltage. It isn't that big of a deal to
drop the correct motor on the
unit and
wire the controls appropriately. I suspect single
phase winches are harder to buy.