You can stencil parking stall numbers and stall markers on hard surfaces, or use a simple pole mounted sign for gravel/rock areas, and specify stall numbers in your Rental Agreement for each unit.

I'm eastern european (slav) and am medium height and fairly athletic, but not bodybuilder and definitely not bulletproof.

Congrats on doing something that is working for you in your market.I see this exact same discussion in bodybuilding forums. 

Joining a gym will not garauntee you will become a bodybuilder or fitness champion.

Every living room has a theme, it can guy action movies, rock and roll, labrador retrievers, duck hunting, deer hunting, bodybuilding, western movies, etc. 

Bodybuilding/BoxingShooting moving objects with a shotgun/reloadingWelding/fabricatingDrinking beerMaking fun of inferior peopleSabotaging my competition in the R.E. world

I realize that to get good at anything (Mastery), whether bodybuilding or real estate, you have to put in the time in both quality and quantity.

I come from a bodybuilding background.

You think the flowers are stenciled onto the tank for "camouflage" purposes?

everybody wants to be a bodybuilder but nobody wants to lift heavy weight.