@Michael Bennett If you do the math you are still making a decent cash return!

Once I establish I'm doing the math correctly and I find some good options in the area, I'll probably invest in 2-4 units.

Hello, I had a "math" question of the yield created by selling a partial on an originated note. 

Then,  do the reverse math at current market price, property taxes,  maintenance, renovation cost,  etc., and see what a building "should" cost.

This is my issue in feeling like I can't go away.And I suppose theoretically I could map the circuits and outlets for them really well to give a better idea of what's on one circuit for them to do the math.

You can do some simple math and figure out if paying double interest will be worth locking the lower rate or not.

The math gets pretty complicated to explain in paragraph form when I start talking about saved rent or saved vs a mortgage on another home, so I went simple here to assess if the base unit is a good plan if I should decide to move out before the 30 years are up. 

I don't know what your actual numbers are, that's just an example with some easy math.

Recommendations for a good area for buy/hold in New Jersey where the math makes sense... any ideas? 

Do the math here… you with 300 dollars per property (2 months of work to buy a turnkey rental) you are going to need 20-40 of these to replace your income.