Just as an idea I leave a schematic to show how easy it is to build a chassis.
Nice chassis .... but I agree with KMossman (well, except about the math) in finding metal work difficult. Woodwork, no problem, as I have a complete shop, but metal ....
making the PCB?
1) I get them made in China very cheaply.
getting the parts?
2)Next day delivery.
the chassis and getting it to look good?
3) Cutting accurately is quite hard.
getting the right layout [in the chassis/cabinet/case]?
4) No problems if the chassis is big enough.
5) So long as you are thorough there should be no problems.