Getting a tenant isn't an overnight thing, you may have repairs to make before getting one, so it could be a few months of paying double before you see any income generated from your househack. 

Con: The rate on HELOC is more than double the first mortgage, and I worry about the rising rate.2.

Consistent singles and doubles add up significantly over time.

Yes, you can be double-taxed by both the U.S.

And your appreciation compounds so 3 to 5% today on 600k is X but 3 to 5% in 10 years might be double. 

I pay all cash double digit cap rates with NNN syndications.

You have 3 properties now, and when the time is ripe, ie the tenants have paid down, inflation has gone up, and your tax situation calls for it, you can refinance and pull out cash and double your holdings with 3 more long term buys.  

The sheer volume of money and investment flowing in all the northern New England states over the past couple years is unheard of and created a highly competitive marketplace of rentals with investment that do not appear to be slowing down, even given the rental rate’s dropping double digits over the past couple years.

So double check with the county on any of those requirements if any.Where does the water come from?

But great story on how they almost doubled the projection by having a high end design.