Just my opinion:
It seems to me that you like to study and repair analog audio equipment as well as record and have a studio. Really, if its not affecting you financially or with family life, then its OK. If it is, then that's a whole different serious ball of wax. If it's just a storage problem, you can fix that easily enough.
Many hobbies are expensive, but its not like you are spending 2k or more per piece of equipment these days. If you have fun doing it, then do it. If you think you are going to fix a piece of equipment, then keep it, otherwise sell it, or fix it and sell. Many options.
That's why I keep my old gear and am looking for other analog gear right now, I like having it. It's fun. When I don't think I'll have a use for the equipment anymore, I'll sell it. It's not affecting me financially or my family time. No big deal.