Just got off the phone with the zoning guy and he said since both of my lots pre-date the zoning regulations in the city, they're grandfathered in so-to-speak, which means I am able to build a single family on each one!

What we really need is a single internet "bad tenant" list to warn each other.

Does this strategy utilizing HELOC really work on saving money and paying off mortgages much quicker?  

If you're getting started, I'd suggest focusing on single-family homes in growth areas with strong population trends—let me know if you need help finding the right deal!

Now purchasing a home with cash is always good b/c obviously cash is king but also I think the part you might've missed is that, the money your utilizing on these home's won't actually be yours, but the banks or whatever institution you used to fix the home or make its value worth more.

Imagine if you had one single-family home.

Flipping works well if you’ve got solid contractor connections, while rentals (like single-family homes) can be great with a BRRRR approach.

Utilizing empty lot space in this way helps to combat the increasing housing prices and limited supply many markets have been experiencing.

Still, we are looking for more granular data that breaks down by unit configuration closer match to the minimums set for each military, rank) plus estimates for the costs of utilities. 

This is especially true with single family homes.