Got some IO and also 30 year amortization for some of the BTR product we have acquired. 

Yes, it is a paid product, but it is worth every penny.

You should definitely check out Avery Carl's BiggerPockets book "Short-Term Rental, Long-Term Wealth" https://store.biggerpockets.com/products/short-term-rental-l...There is a lot of amazing insight into everything to think of while operating an STR.

HELOCs are very much a short term product, because the interest rates can go up precipitously, they have been called due in past credit crisis situations.  

Obviously you will also want to walk all of the units physically during your due diligence period to see the condition of the apartments inside.

Fracting increased the productivity of our purchase resulting in over 50% of investment being distributed in our first year.  

@Courtney HamiltonI have found that my rental listings are no longer Auto pushed to Zillow even though Zillow generates by far the most traffic for a rental listing almost 70% of the leads are from ZillowWhen you do your market analysis I would highly recommend pricing your property $50 below your competition because best products and best price equals the best tenant.

They may require you to use their services, but they may not be as picky about whether the plan was their production or not.

I'm hoping tenants don't start pushing back on needing a physical key.

It's not the cheapest yet their price were not that much more than their competitors and SIW was a better product.