DIY Bolt-Together Frame Ideas?

[HandyAtLeast]

I'm not a welder so I am looking into designing a 5x8 frame with 935lb adjustable half axles using a bolt-together method of construction. The TD would need to be light-weight for pulling behind a small car.

I've been looking at the Ultralight Chassis in the design library. Anyone have any strong feelings for/against it? I would be fine building the wood floor structure to sit on top of the frame. Any drawbacks or special design considerations?

I'm not against sourcing the material, cutting the pieces, and having someone weld it for me, but for kicks I'm entertaining the concept of a K.I.S.S. bolt-together design. I have access to metal cutting bandsaws, drill presses, etc. and I will someday learn to weld. For now: bolt-together.

I'd like to model some designs up and make dimensional drawings after I get some feedback. I'd be happy to share when I can put them together.