I like the idea of having an arcade rather than a museum. A museum sounds pretentious and reliant on donations where an arcade is a business that is built from hard work.
I've kind of been rolling the idea of having an arcade for awhile now. MSA in Lafayette is a secondary job for Dan that he does in the evenings while also doing a little repair for others. He also lives in the upstairs.
That seems to me to be the perfect way to do it and hope to emulate someday. Don't wait on it though. Start saving now and building your credit. Always look for a main job that pays a decent wage and that you enjoy.