It's hard to get government backed lending at the age of 20 with small income and short credit score history.

The Government actually LOVES INFLATION.

Even mortgage lenders give favorable considerations to those that may have a bankruptcy due to events beyond the applicant's control, like divorce or medical bills.In the eyes of any regulator type, saying they must pass a credit check is not giving any qualification level to be met.

@Jonathan StoneAs I understand the rules and regulations I have to file a permit with Tillamook County, and have an inspection prior to listing.

Try to find professionals who are experienced with seller-financed home transactions—and who have experience where you live, if possible, because some relevant regulations (such as those that govern balloon payments) do vary by jurisdiction.Professionals can also help the buyer and seller decide on the particular agreement that best suits them and the circumstances of the sale.

I just know it takes a lot more research into zoning and city regulations.

Also be aware of strict screening limits and enforced process for screening (first in time) and that its likely we will lose even more rights around screening - our local city councilperson who has been pushing for (and getting) all these regulations has now decided that FICO score is 'inequitable'   (using a different word than they did) and they are pushing to ban that from screening. 

However, I'd be surprised if you weren't able to make house hacking a duplex work numbers-wise in medium-sized markets and larger, especially if you are willing to set up the vacant side as an STR in a travel market with reasonable STR regulations.

Since short-term rentals in the US could become over regulated or downright illegal (where they aren't already), the resulting cash flow and profitability could drop hugely if not becoming downright negative in case of a conversation to long-term rental.

Well The bank is worth millions they also have the financial backing of the government it’s fdic insured and they hold the deed of your house and qualified you as being well within their screening to pay the mortgage long before you got in the home they also required a large chunk of your cash for a down payment .