I was puzzled about the different FSBO financing options and how would they affect the profits within different amortizations/ down payment/ interest rates etc. 

I am puzzled, however, that Peer Street with no skin in the game is able to attract  many investors. 

That is a very important piece of the puzzle and has an impact on the choice.

I’ve got about another year and a half before I will retire, so I plan to use the time to get a big jump on the education piece of this puzzle and to build up some REI momentum prior to hanging up the uniform.

Digging holes and making sure you pick up the grass in a way as a jigsaw puzzle piecre, putting them back so they fit.

I must be a slow learner because as I learn more and more, I find that I am more puzzled by the market here in Austin TX.I was recently trying to use the 50% rule and the 2% rule as different ways of looking at the same duplexes here in Austin.The average duplex here that costs around 200k only rents out for a total of 1200 for both units because they are generally in a 'worse' area and the nicer duplexes that cost around 300k only rent for about 2400 total for both units.

If you don't know your repair costs yet, which it sounds like you don't, then figure out all the other pieces of the puzzle like the ARV (after repair value) by looking at comps, figure out your financing costs by talking to lenders, and you can back into what your maximum repairs could be.

The land is the cheap piece of the puzzle for 2-4 unit construction.If you want to build for yourself, you need to find a builder that you can work with and is able to do the project. 

Lots of pieces in the puzzle. 

., then once you find a good P.M. or any other piece of the puzzle I would hit them up for referrals as birds of a feather tend to flock together.This reminds me of the first quality person I encountered in Detroit, he was and is a realtor who has always been up front and honest.