FYI, HELOCs tend to be interest only, adjustable, and inexpensive to close.

If you buy a property for $100,000, rent it for $2,000/month, and pay $1,000/mo in expenses (including the mortgage), you earn $1,000/month in profit.

Landlord pays Water for all units + Gas/Electric for the Triplex (roughly $580/m just in utilities).When calculating NOI, I have accounted for the utilities he's paying + 40% in expenses from Vacancy/Repairs/Management/Capex.  

It works on cell signal, easily portable to the next project, and fairly inexpensive.

To keep it inexpensive is a bit of a trick because it involves flipping back and forth between their cheapest monthly account and a free account.

I closed on a very inexpensive condo at the end of May and am finishing up renovations right now (doing the work myself). 

For investors who live in expensive markets, or work full time, going OOS with a provider who has it all done for you can be a great idea.

We did quick inexpensive fixes and rented to a low income person who applied for weatherization and the program put in new double pane windows, a new cooling system and insulated the attic. 

Or inexpensive upgrades can be added to make the units stand out in the rental market.

Also the education you get from REI groups is extremely inexpensive.