I have a furnishing and design team to help out if you’re not wanting to come down personally and I also co-host at a discounted rate for my clients.  

Head over to bank rate or and take a look at the mortgage calculators, plug in the numbers and get an idea of what the property needs to generate to satisfy the intended debt.You still have to underwrite the deal for the non-finance expenses as well(typically 40-50% of the gross rents). 

If you pay cash for something and are able to refinance at a rate that makes sense to pay off your HELOC, that's the only thing I could see making some sense. 

If you're $400 below market rate I'd give them chance to "catch up".

Assuming I also use the Airstream for lodging while traveling for personal reasons, would I just take a pro-rated amount of depreciation for the amount of use that is business vs. personal?

I just got something small and well within my means - refinanced when rates got low and now it's a decent little cash flowing rental 

I know a lot of investors have done very well in Peirce County but I just haven't learned or know enough about that market to make an investment there.Washington state properties are expensive and can be difficult to make breakeven let alone cash flow at this moment due to the combination of high prices and interest rates. 

Is it possible to get a FHA at a good interest rate with just a good credit score and proof of my start date?

I started off doing long distance BRRRRs until the rates went up.

But at a lower rate compared to other cities that are growing.