I can certainly supply some.

If you use Airdna you have to calculate manually and subtract in general though, you can think of your cleaning fees, debt service, capex contingencies, and other operating expenses (supplies, utilities, etc) as a sort of “hurdle” that you need to overcome with revenue before you start making a profit.

A HELOC will have a variable rate. 

This can be a slow going process to start but once you have a good portfolio of properties the equity will be there to scale... doing low down payments and variable rate mortgages etc. is risky and doesn't leave enough skin in the game to do much with. 

I think the variability in rates on them is a pretty big risk.

And in a city like Austin or Dallas, it seems like construction is always prevalent so it will affect supply despite the influx of new workers moving to the central and north Texas. 

This is all about supply and demand.On the podcast, I'd start at the beginning.

Living room (fl 2) has one supply and one return vent, medium sized bed room (fl 3) has one supply vent that isn't pushing as much hot air as other supply vents. 

Another option is to check with your local mobile home supply store.

So many variables when evaluating commercial property.