I'm following the same strategy you are in powering up 100% from my own posts as well as buying STEEM at these bargain prices. I'm pretty new here but I've managed to scrounge up over 1000 SP in a few weeks. I like your renter vs owner analogy. I hope you're right that those of us who are reinvesting and investing in the steemit community will someday reap huge rewards from it.
My strategy here is long term and I thankfully don't need my gains here in order to survive. I have a good job and I have enough money to put some of it here and know that even if I lose it all (which I doubt will happen) I'll still be fine financially even if my ego would be a bit bruised lol.
Sounds like you've got a solid strategy going so far. Good stuff. :)