would go with a gym floor finish, lasts for a year in high school gym use, then gets screened and new finish applied. Should last for a lot of years...
Regular full load amps, IF the VFD is programed correctly (probably factory settings) then it will ramp the motor up to speed instead of drawing high...
Like Mike I have the Dewalt 12v, 18v, 20v and 60v. I prefer the 12v in the shop and around the house. 18v and now 20v at work and for larger, heavier...