Kinda related, I remember back in the day I experimented with constructing a liquid fuel Gasoline/LOx engine. With the end goal of an orbital rocket essentially from scrap. Got to a semi functional prototype before getting bored with modern life and going off to live in that abandoned cabin for a while. Probably for the best I stopped though, the local government is rather squeamish of such devices made by citizens.
moonlune wrote
https://copenhagensuborbitals.com
these guys are crowdfunding their week-end rocket building.