They typically have high leverage so your equity would give you significant purchasing power.

That way if something goes wrong with the second, you can use your reserve to fix, without affecting your purchasing power for the next one. 

I think doing this in a Roth is the most powerful way to do it paying tax on the seed instead of the harvest.  

and he's growing.. getting more purchasing power as he grows  so that he can offer discounted properties for his members.

I am not currently house hacking, but this allows me to rent the home for a profit when we move out in 6 months, which would be impossible if I took out a new loan to purchase.I have blog post on this topic if anyone wants a little more of a deep dive into the powerful strategy of combining these two methods!

Such a powerful tool when used right.

You could monitor the power usage for the two units using this device then pass through the correct billing. https://www.amazon.com/gp/prod... 

In addition to what has been said, a Solo401k is super powerful.

I'm in a different market and have a gas power boiler for baseboard heating. 

Cash out refinance puts the cash into your hands and money is power and it can be kept in a savings or another interest earning account to offset the mortgage rate.