Re: welding and welder options
Check out the Ready Welder. I use one on my service truck. It's a 24v DC Mig spool gun. Power is from two deep cycle batteries, or three for more heat. Uses shielded wire or plain wire with a co2 bottle. Can do SS or AL with proper wire and gas mix. Gun and cables fit into a briefcase. Welding time varies with battery condition. Took a couple days to weld up a frame for the dump bed on a pickup truck, discharging and recharging batteries. Fixing brackets and other small projects can be done right away.
I took a welding class at our local Community College.
Best wishes however you go.