We are building a mutant vehicle (our second) based on a short 1990 school bus, and we want to build this platform:

and attach it to the roof of the bus. As you can see from the picture, the total number of welds/joints is under 30, but it has to be done well to hold people up securely. Hand railing itself, missing from the picture, will be made out of wood. We're looking for someone to suggest and get proper materials (probably used square metal tubes from a metal recycler), build this platform and attach it to the bus. Please reply here or email me at sashamalchik on yahoo with an estimate.
The bus is parked and can be worked on in Berkeley.
Thank you!