For a first try at a one off design, with some severe design constraints, 'cheap' is not going to be the main factor.Alright, I looked at the replies once again.
Both of you mentioned wood and lexan. What do you mean by this?
Are you suggesting that I build my case with wood or lexan insteadd?
Where can I do that? Is it cheaper than Protocase's steel case?
You will go through several mockups before you get one that 'works'.
I mentioned wood or lexan, because you asked for other options.
But unless you already have the tools and skills, wood is off the table.