1) will the loader stay on 24/7
2) I'd say make/buy a 'carryall' and put weight on skids(1 light, 2nd heavy)
When you need extra ballast,put carryall on, grab a skid of weight based on what you need for the job.
filled tires would be fine for 'light' loads.
wheel weights are ,kinda , permanent.....
ballast box, generally is ONE weight..
carryall..easy to get on/off as needed, and ballast can be 'dialed in'
what you choose should be based upon actual use at the time. it'd be cruel to the tractor to have to carry 1234# around ALL the time.