A key part of your projections will be mortgage terms..check in with @Joseph Chiofalo he has a fun comparison tool and my go to lender for over two decades.

Rentometer has been completely wrong in terms of rents for my area. 

Short term looks good to pay it off, but a look at the long term tells me…leave it in 401(k)!

Option 2: Private LoanIn this option, a promissory note is written for my partner to loan me the down payment amount (20%/$46K) for a 2-5 year term at a 10% interest rate (details are still up for negotiation - are these terms reasonable for this kind of deal?).

I would like to retain this house and turn it into a mid-term or long-term furnished rental.I would like to move out of that house and into a bigger primary residence which would likely be a $750-850k purchase price.

@Bill Gulley I like the way you think......The only snag is getting a seller to agree to this original contract term.  

Purchase price: $770,000 Cash invested: $300,000 First house hacked for 2 years then moved out and converted to mid-term rental.

And with a lack of five-star communities, there's a major focus on the primary MHC market, which is much more stable in terms of occupancy and cap rates compared to traditional multifamily properties.Well, there you have it – the manufactured housing community sector is a hot ticket, with demand growing, rents on the rise, and occupancy rates staying solid.

You can access cash out equity lines, fixed seconds or conventional loans with reasonable terms to contribute to the downpayment.

"Pre-foreclosure" is a term that is misunderstood often...it indicates that "lis pendens or notice of default is filed (consider it a lawsuit) until the property is sold."