I have allready started buying some components that i find in a reasonable price. I am still working on my design of the chassis. I have been using autocad to do my drawing. Can't say that it's the best software to use but this is available at the moment. It is a slow proccess since i am not a cad expert.
My chassis is completely custom made trying my own design as i don't think i will fit in any other existing chassis.
I need to test the design for stiffness. I downloaded Grape GBW32v40 as you can open dfx files from autocad. Unfortunatelly, this is the last stage that i managed to do. I have not a clue how to operate Grape. Can anyone help me plzzzzzzz!!!!!!!!!!!!!!!!!!!!

I too found Grape impenetrable so I use the Framework program from here.