your getting the MLM  enthusiasm you deserve it pitch. reality is far different as stated above.

And there is a big difference between a German duplex and a Polish Flat - the polish basically moved in their own basement and rented out their house.

There is a difference between your acting as a HML and a partner, if you and he join together in an LLC you can act as the money partner making the loan internally in the company without being subject to lending regulations as an outside lender.

In the end this cost segregation approach is only a Timing difference - you pay less tax now, you pay more tax later.3) Consider if an S-Corporation makes sense. 

If you're asking for free advice from a stranger on the internet, I'd encourage you to find a different STR market unless you want to have a place in Kissimmee for personal use.

HI @Theo SengOne of the main reasons someone would be looking to seller financing is if they cannot qualify for a general conventional/FHA loan & they want to get into a house.

That can really throw off property values.Just move on to a different lot if you can't live with these restrictions.

Your best bet is to shop around with a few different brokers as each of them cannot write for all the available companies.Here are a few to check with:TWFG InsuranceRiverlands InsuranceGoosehead InsurancePat LeBoeuf Insurance

What's your main objective that you are trying to achieve?

You will meet people from different walks of life that will give you different perspectives on real estate investing.