This creates a vapor barrier that prevents humidity and odor from entering the interior of the house.  

@Steve Morris Excellent tip.

@James Hamling excellent post!

Reserves can get tough when you dollar is only being counted at 50%.So, if your deposits aren't any better and your income is still "low", then DSCR sounds like an excellent option for you where you personal income plays no role at all. 

Just hit them with the full amount and they will either accept it or leave.If they are an excellent renter (always pay on time, inspections show an immaculate home, good communicators, etc.) then you may consider encouraging them to stay by keeping rent a little below market but no more than 5%.

When it comes to advice on when to communicate with tenants who do not comply with their written leases and who do not communicate, @Nathan G. consistently provides excellent advice.

Cons: more maintenance, higher utility bills, need preventative maintenance in place (vapor barrier, adequately sized dehumidifier, HVAC/mini-split), higher insurance. 

While qualifying for a HELOC is dependent on your home equity and your credit score, good or excellent credit makes it easier to qualify.

I have excellent credit, own 7 properties in that neighborhood, and have extensive experience managing rentals.

Excellent work!