I've never lived anywhere with a basement, but have heard plenty of lore about potential difficulties.
Another possible solution if the space is dry would be to add a thin subfloor. 6mil plastic vapor barrier, 2x4 grid on the floor with wide side down (to preserve ceiling height), shims to level it. Then a layer of T&G underlayment of flooring sheets.
Not cheap, but probably less than a full pour of leveler. The problem of leveler is if it is too thin and not properly bonded to the original floor, it'll chip and crack as things are wheeled about.
One garage I had (single bay, 20' deep) had a standard slope of 3" down at the door for water drainage from slush dropping off a vehicle. This was no problem for tools, but I could tell things were slanted while working. Biggest problem is the dips.
If the "critical" tools are set up in a spot to be level, you could mark the locations so when you wheel them into position for use, they are ready to go. May involve shimming up casters or feet for the initial leveling.
Also, if you make mobile bases that are wide enough for stability (i.e. bandsaw), you can just use three wheels and they will always be free of rocking where ever you set up.