I don't understand why the F people care that you would do work in a parking spot. Seriously, how can they possibly be bothered by it. I understand if you have to sign an agreement not to.. but other people living there should seriously not give a sh*t.
If you have a place for it, you've got it good. Don't even worry about it, especially for something like an oil change that takes 15 minutes. If anyone complained about that they really deserve a punch in the eye! Just do it wherever.
I am not even lucky enough to have a parking spot.. I get the joy of street parking and people asking me for money every 15 minutes when I work on the car. You just have to ignore people who give you funny looks. What do they know about you anyways? No big deal.
I have actually spent hours doing work right out on the street.. installed prothane engine mounts, the full exhaust, and numerous other maintenence things (like axles and stuff). I usually feel a little ridiculous when I go out and start lifting the car up and stuff on the road but after about 15-20 I get absorbed in the work and don't even care anymore about what it looks like. A parking spot would be a luxury IMO
.. its also sort of unsafe to be under a lifted car on the road because there's always a chance someone could hit the car. But it's a slow and low traffic area so it seems ok most of the time.
Anyways those are my thoughts.. if you can't afford a garage, don't worry about it. Just do what you need to wherever you can.