I just bought this for myself, because my existing little lightweight welder cannot weld the thick stuff. I’m planning to make a DIY tube bender and I will need to weld some 1/4" thick stuff and a little bit of 1/2" thick stuff. (Note: this is an affiliate link.)
VEVOR Stick Welder, 200Amp Stick & Plastic ARC Welder Machine, 110/220V Hot Stapler with Hot Start Arc Force Anti-Stick, Plastic Welding Kit Car Bumper Repair Kit
Also, they have a great deal on a 5000 watt step-up/step-down transformer, which can get you 200v for the welder, from a 110v outet. (Note: this is an affiliate link.) I use one of these with my plasma cutter and my electromagnetic sheet metal brake and it works great.
VEVOR Voltage Converter Transformer,5000W Heavy Duty Step Up/Down Transformer Converter(240V to 110V, 110V to 240V),2 US&1 UK&1 Universal Outlet with Circuit Break Protection,5V USB Port,CE Certified$84.99