$40 is a deal for that repair. Jump on it.

I don't unwrap my torch and turn on the argon for that price.

I admire your desire to learn tig. It is a very versatile welding process. You may want to keep your eyes open for a used Syncrowave 200 or so. They're tough units so they're probably good even if several years old. I just upgraded my Sync 250 to replace a 12 yr old unit.

Tig welding will require considerable practice to become proficient. Believe me, it will be a while before you feel comfortable tackling "thin" aluminum.

Good luck.