@Dayana Castellon the only marketing that would make sense is marketing Airbnb & VRBO are NOT covering already.Maybe market directly to insurance companies looking for rentals for their clients needing temporary housing while their fire-damaged home is being repaired.Corporate travel departments might be another option.Hospitals with resident doctor programs.The challenge will be doing this marketing efficiently enough to make it worthwhile.

most west coast states you cannot get a deficiency on a purchase money loan on a primary residence..

Investment Info:Single-family residence other investment.

The important points often glossed over are (1) is the buyer providing their personal guarantee to the seller for the note (2) is the seller maintaining a wrap position so they can foreclose in the event of default and gain ownership (3) is the buyer putting up additional collateral (4) how large is the down payment (5) what is the LTV (6) is this a personal residence for the seller or investment property (7) will the property cash flow and if so what will the cash flow be (8) is the property in a increasing, declining, or stabilized area (9) is the property being sold at market value, or above market value because of the low interest rate of the existing mortgage and (10) how experienced and what is the track record of the buyer, and is the buyer purchasing a property for investment or to live in or otherwise use.  

Second all regs apply to owner occupied residences and NOT commercial or investment property, although in theory it should not matter.

I have tried going through the conventional route of HELOC and Home Equity Loan for my primary residence.

Then I bought a bigger condo for our primary residence in 2022 for 275k with a conventional mortgage (5% down,1.5% APR).

-We are closing on a primary residence in a couple of weeks that has a cottage on it that we will begin short/mid term renting upon close. 

I would strongly recommend looking at the BiggerPockets lender finder since all those lenders are familiar with the investor mindset even if this is for a primary residence :)https://www.biggerpockets.com/business/finder/lenders

But you know enough to be able to fill in the blanks and get close... public records, utility companies, visiting with residents, walking the park and networking with other park owners.