Imputing your time into any analysis and how active or passive you want to be is a big piece of the puzzle as is your horizon and risk tolerance for this investment for this part of your overall portfolio subject to the needs for the distributions.  

I think the ROE is the piece of the puzzle I have been missing.

We also keeps a lots and lots of books, puzzles, and boardgames as well so they have something to do if they are getting bored at night while the power is out. 

This puzzle comes up a lot in the forums.

I'm also a little puzzled by these expenses.

That is the other piece to this puzzle.

I am a bit puzzled how those two random houses have more than one unit in R2 zone. 

Local ownership ,  and a lot of other topics.I suggest you read a lot, and then ask questions about things that puzzle you   and for heaven's sakes, stay away from Arbitrage AKA Master Lease AKA subleasing.

When you work your mind (heck, even by doing crossword puzzles), you'll find that you are able to make connections easier.

Finding a deal is the hardest (I repeat - hardest) piece of the puzzle.