DIY homemade go kart that I put together. Almost every tool used is from Harbor Freight. You can get my model, just download Sketchup, search in the 3D warehouse for “Mech Master go kart”. It is not perfect and that’s the point, you can change it however you like.

Most of these items are not required but nice to have. Lots are duplicate like the many different types of clamps I have.
Frame:
Chop Saw: https://www.harborfreight.com/14in2...
Safety Glasses for my camera: https://www.harborfreight.com/safety...
Ear Protection: https://www.harborfreight.com/industr...
New 14” Cut off Wheel: https://www.harborfreight.com/14in2...
Welding Table: https://www.harborfreight.com/adjusta...
4 ½” Angle Grinder: https://www.harborfreight.com/412in...
4 ½” Grinding Disc: https://www.harborfreight.com/412in...
Razer Blade/ Utility Knife: https://www.harborfreight.com/folding...
Framing Square: https://www.harborfreight.com/4in1...
Clamp: https://www.harborfreight.com/6inqu...
4 ½” Cut off Wheel: https://www.harborfreight.com/412in...
Square Clamps: https://www.harborfreight.com/corner...
Tape Measure (Sometimes these are one of their free items): https://www.harborfreight.com/25ftx...
Yes you can weld a frame with the cheapest welder HF has. (I did my first go kart frame with their old blue 90 amp): https://www.harborfreight.com/flux12...
Welder:
Most of the welding was done with this guy: https://www.harborfreight.com/migmax...
Some with their stick welder: https://www.harborfreight.com/80amp...
Welding Helmet: https://www.harborfreight.com/reddes...
Welding Gloves: https://www.harborfreight.com/3pair...
Magnet Holder: https://www.harborfreight.com/434q...
Bar Clamp: https://www.harborfreight.com/60ina...

Seat:
Jig Saw: https://www.harborfreight.com/5amph...
Clamps: https://www.harborfreight.com/2inch...
Pneumatic Staple / Nailer or Hand Stapler: https://www.harborfreight.com/18gaug...
Compressor: https://www.harborfreight.com/8gal2...
Bits: https://www.harborfreight.com/titaniu...
Electric Drill: https://www.harborfreight.com/12inh...

Steering:
Portable Saw: https://www.harborfreight.com/10amp...
Saw Blades: https://www.harborfreight.com/4478i...
Cordless Drill: https://www.harborfreight.com/18volt...
Drill Press: https://www.harborfreight.com/8in5...
Cutting Lube: https://www.harborfreight.com/12ozt...
CClamp: https://www.harborfreight.com/2inch...

Drive Train:
Metal cutting blades: https://www.harborfreight.com/tshank...
Die grinder: https://www.harborfreight.com/14qua...
Rubber Mallet: https://www.harborfreight.com/1lbru...

Paint:
Painters Tape: https://www.harborfreight.com/60ydx...
Primer, they don’t have a neon green color: https://www.harborfreight.com/10ozi...

Assembly:
Folding Saw Horse: https://www.harborfreight.com/foldabl...
Combination Wrench: https://www.harborfreight.com/9piece...
Socket Set: https://www.harborfreight.com/21pc3...
Hex Key Set: https://www.harborfreight.com/18pcs...
Adjustable Wrench: https://www.harborfreight.com/4piece...
Ratchet: https://www.harborfreight.com/38ind...
Storage Bin: https://www.harborfreight.com/20bin...
Screw Driver: https://www.harborfreight.com/12pcc...
Chain Breaker: https://www.harborfreight.com/heavyd...