He may create a renting service. Recently on a few devcons I saw a retro-corner. It was just a bunch of few popular machines like early apple, c64 and few other

He may create a renting service. Recently on a few devcons I saw a retro-corner. It was just a bunch of few popular machines like early apple, c64 and few other machines. You can go there, play with the machines - there where a few games loaded there, that's it. It will require more work and may be dangerous to the hardware (transport) but probably there is some demand for such services. More demanding thing to do would be to create a kit for hobbyists. For example I never heard of IBM 8086 DIY clone available in Europe. The market is very niche and would require some work (ordering printed circuit boards; handling customers). Not sure if it benefit would be worth the costs - most people that are doing those kit's usually stops after a few years. The last option would be to write a book about one particular machine, with schematic and stuff. Probably there would be some licensing issues. I would gladly buy a book that described working on IBM 8086 in all technical details. Currently such knowledge is distributed among old IBM manuals and obscure PC emulation forums.