I've got three rollups in my shop. Each has two slide locks at the bottom.
Not a big problem, I can kick them open and closed with my foot.
When I go out of town, each has a hole that I slip a padlock thru.
May not be a lot of help though. Grinders, saws and wrenches are within reach of the doors!
for locks, I went to Lowes and bought three, 6 packs of Masterlocks. Looked at the key code on the back of each package so they are all keyed the same. Threw away all my mutt padlocks.
A few for the doors, on for the shed, each trailer. Nice to have them all with ONE key! Should have done that decades ago.