How easy is it to find people with the know-how? How much do they charge? I'd think you'd find dozens of qualified volunteers willing to work pro-bono to keep

How easy is it to find people with the know-how? How much do they charge? I'd think you'd find dozens of qualified volunteers willing to work pro-bono to keep a Apple ][-powered museum running. How about 10 years from now? You'd find slightly fewer.