Piper cub, Maule, Citabria are all good planes for 630m grass, need hangarage and are relatively cheap to run and good fun to fly, they will long survive after the others have gotten boring.
As for your point on Experimental, there is nothing preventing you paying for an engineer to do the work for you, what you do not have to pay for is the CAMO or the signature or the other paperwork bull. You also do not have to buy certified parts which makes them orders of magnitude cheaper... The money you save flying experimental will be far, far more than you will earn from renting to a school or club - who will not treat your plane well and will always want it on the days you want to fly.
My main tip for ownership is to keep it all as simple as possible and avoid stretching it so that if something else happens you wont be in a situation where you need to sell it in a hurry or even worse, stop flying and maintaining it.