This isn't to build or maintain a boat - but it could be! If I'm wrong, report it and I'll get it moved...
I learnt to stick weld when I first started work, the company believed in a wide experience so my first three months saw working in a sawmill, sheet metal, paint shop, PCB manufacture, conformal coating, metal (and plastic) turning etc. In those days MIG was not a thing.
I've now got a lot of small jobs in the garden such as bird tables, hanging baskets, seats and tables. Individually I'd bodge with self tappers and cable ties but I'm tempted (I like toys!) with a small welder such as the R-Tech 180A. I know I'll need a mask and gauntlets but the gas supply has me stumped.
I used to SCUBA dive - our tanks were rated by capacity at ambient pressure (also known as "water capacity" or WC) and a rated pressure - example, a 12l tank at 200 bar was 2,400 litres of usable air.
MIG tanks are "different" - The most common seem to be "disposable" weighing around 4kG and holding 60 litres of 86% Argon / 14% CO2. At the quoted rate for a MIG torch (15l/min) they last around four minutes - that seems awfully bad for the environment (and my wallet!) - throwing 1 kG of steel in the bin every 60 seconds!
Are there more sensible options for MIG - or should I revert to Stick Welding?