^^^ I wouldn't trust 3/4 plywood.
The lift is used every day for the cars...until I sold the SC last spring.
Now it's just a parking pad until I change oil in one of the cars.
The other two stalls are always taken, so moving everything to get to the side of the lift is out.
I do have the xtra hd caster wheels for the lift....and I've moved it a bunch of times in the first couple years after buying it. It's in it's perfect spot right now.
I have a floor drain in the garage, but I never use the hose in there. It's so easy to sweep it when it's smooth. I mop it about 3 times a year.
I'm kinda surprised that the lift manufacturers don't offer some type of add on for lawn tractor maintenance. If they did, I would consider it.