As far as I know, your assumptions about the tax implications are correct for non residents, it was one of the main factors that stopped the idea of investing in Spain for me.

But if you're willing to take a tiny leap of faith, I think the returns are solid, the diligence and the integrity are there, and the states/markets/submarkets and the asset class are thumbs-up.

Whether these factors outweigh the challenges is a personal decision. 

We measure against 15 different factors.

Location and amenities are the two most important factors that bring potential renters to an STR. 

Some other factors to consider - How long are you planning to hold this property?

A purchase of $209k, $15k rehab, and ARV of $240k doesn't get you any thing back after you factor in all of the closing costs to purchase and to refinance.

Just factor the cost into the rent.

I've also had guests buy their own TP and trash bags and leave the extra.As for toiletries, I leave the traditional "Starter Set" of shampoo, a little bar soap, conditioner, and lotion  (the tiny hotel bottles). 

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).