I just got my PowerPro 205 and a small argon bottle 55cf (I think) a week ago. And I'm already running on fumes. I did have it flowing too much for the first few days but readjusted from 16 lpm to around 7.
I've been practicing every night maybe 10 minutes or so actually welding. Is this normal type consumption? If so i will have t o buy an extra bottle. Here the lws shops on sell 55cf anything bigger you have to lease and pay for the gas. It cost 200 for initial purchase then 40 to refill/swap. I believe it 130 per year for a 150cf plus gas. It seemed like the better way to go for mig but if tig cunsumes that much more it may be worth leasing.

Chuck