I've been in Real Estate since '87 so I like to invest in what I know but outside of my company, in my personal portfolio I have about 20% outside of Real Estate assets in other types of debt instruments, private equity, and a bit in the traditional stock market. 

While forced appreciation—that is, renovating buildings to raise their value—is the main method of extracting wealth in the BRRRR approach, long-term property appreciation can also boost total returns on investment.Financing Options: To finance the purchase and renovation of properties, investigate the availability of financing options such as hard money loans, private lenders, and traditional mortgages.

You can use the cards as a loan to get cash with very low to 0% interest or use them the traditional way.

I was a little taken by how high it was but the broker explained that it is always going to hover higher that the traditional which is around 7.5 FHA is around mid 6 right now 

I plan to sell them traditionally or by cashing out and refinancing.

There are no investments that are immune to risk in general.I like to invest in growing markets that also have traditional tourism draws, but that is my preference. 

Your agreement with Obligo is that you will pay a monthly fee instead of a traditional security deposit.

Yes - the Multifamily DSCR Loan option is a strong option here - not sure if you've seen this BiggerPockets article on Multifamily DSCR (versus traditional MF loans) but sharing here in case it helps - https://www.biggerpockets.com/blog/multifamily-dscr-loansIs the property now fully leased out?

IF he sold with seller using traditional bank money, he would likely owe a 25% tax on that gain having to count the whole 100K that year in his income.

You may want to look into forming a captive insurance company, which acts as a supplement to traditional insurance.