Really heavy stuff to haul out. 

You avoid getting hauled in to explain something like this to the same person who handles your evictions.

I made a toy model for NNN assets that lays out some super basic parameters in order to get a feeling for what assumptions you'd need to make to get you your 8.5%+ returns. 

OR would people powered toys suffice?

This would be for the long haul.  

Interested in hearing more myself - have been toying with the idea as the yields seem high, but naturally cars (unlike real estate) do not hold their value. 

I would still weigh your decision heavily on service- if you are in this for the long haul, you need a relationship with a lender who will go to bat for you!

Haul in dirt from reputable source.  

Equipping your rentals with inexpensive appliances that last takes a while, but you'll figure it out eventually.A Honda Accord and a Toyota Camry will both outlast a Chevy Malibu and a Kia Rio and be a much better value over the long haul, even though they're all small sedans.

Any spouse in it for the long haul should understand and be willing to support this venture as long as you are willing to keep them in the loop of what you are doing...who knows, they may want to go in with you which would be awesome!