LoLPilot
Line Up and Wait
First, I'm not trying to discourage you. The more the merrier.
But in mainstream aviation the link I provided is what I've personally seen. For experience: go to a 147 school, work at a FBO or Repair Station, or join the military. However, Modtster has a good point as in some areas, outside mainstream aviation, where schools/FBOs/RS are few and far between then things can be different. The same goes for one man Repair stations. That is the reason I stated "almost impossible."
Unfortunately, you "don't make a case to the FSDO" as you must follow what they require. So as I mentioned above, tomorrow, call your local FSDO and ask to speak to a maintenance ASI (Aviation Safety Inspector) and inquire what he/she requires for you to develop a log for recording maintenance experience toward getting your "authorization tickets" to take the General, Airframe, and Powerplant certificate tests. Then you will know exactly what you will need for that record. Report back with any questions.
FYI: I got my A&P test authorization tickets based on experience in a Repair Station many moons ago. Things have changed a lot since then. One of the main reasons the Feds are hesitant to accept experience logs outside the 147 school/FBO-RS/Military environments is that standalone mechanics normally do not offer all the "required mx disciplines" needed for obtaining an A&P. Just look at the study guides for the tests. Or, as I tell people, look over AC43.13-1B and see if your example of buying a rag and tube aircraft and working under an A&P will cover all the listed areas in the AC.
Good luck.
That’s very helpful, actually!