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Look around for the small recovery machines. They’re in the 350-500 dollar range. Tooltopia has good prices for a lot of the stuff, compare with Amazon too I guess.
A scale that I listed earlier.
Gage set.
Recovery tank
Refrigerant Recovery Machines
Vacuum pump
Small Sporlan filter maybe for added protection & cleaning when evacuating.
You’ll probably need a couple of extra hoses to hook everything up too.
Clean, virgin R134A. Don’t get any of the crap with sealant in it.
Edit: Maybe a bottle blanket (heater) too if you want to start getting fancy and speed the charge up a little when it’s cold out or the bottle is getting low.
Either way, you’ll have a sizable investment in the tools necessary to do the job. If you’re patient, you can sometimes find a deal on ebay for maybe the recovery tank, filter, hoses etc. I managed to score a new, extra recovery tank a couple of years ago for a good price.