Its not because you are renting. If you were happy renting you would not be here and we wouldnt be having this conversation. Its because you are frustrated renting and spend all day on housing blogs trying to address that frustration. That is the keep waiting or get on with living point. I bought a place in 1997 at the bottom and I will say it seemed expensive and was uncomfortable then. Very much so and I lost lots of sleep over it. I dont beleive you will ever find the slam dunk this seems cheap and easy situation you may be seeking in SD.
Clearly you do not want to tie up that 20%. I dont beleive there is a real potential for it to drop 20% so we can agree to disagree on that. Even if it did, would there be one you wanted on the market for that price?. Would you be competing with others for it? These questions are all part of the equation.
The example I gave above is how the other nit wits and shady RE agents on the street think and worse. That is your enemy not me.