If you are painting the floor possibly consider rubber tiling it instead ?
I tiled a single garage for about 400 using these people - https://www.garagefloortilecompany.com/ I bought the 7mm thick, but was able to choose offers/batch ends to get the price same as 5mm.
It is very easy to lay and cut - on a larger space even qucker really as the edge cuts take the time and you would have proprtionately less of these.