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

I’m sure in the following 23 years I would have been able to build up at least a $10M portfolio with a ton of owner financed deals and some traditionally financed properties as well given how inexpensive properties were then where I live.

Traditionally housing loans just look like unsecured debt for banks. 

All must be present to win except in some areas of special legislation bypassing some of these portions. 

Usually down payments range from 0-30% down when targeting investor buyers.At the end of the day, the point of seller financing is that sellers and buyers are able to form agreements that are generally not possible with traditional financing, so there's a lot of wiggle room to customize.

I am not as familiar with seller financing as I am with traditional and other types, but looking for any knowledge I can find.

TIAI would run this by a traditional lender as well as have your attorney review the bond for deed agreement.

From house hackers to traditional investors, the financing piece of 4 units and below is widely appealing.

This is going to be unpopular with the STR crowd but I would absolutely NOT invest in the traditional vacation markets today.If you're hell-bent on going the STR route, find a metro area that has lax or no regulations currently. 

The traditional LTR is becoming less and less affordable for the general population.