I'm of the opinion that cheap debt on cashflow producing properties is the best hedge against inflation and therefore it is a good time to evaluate your equity in each property and whether or not to apply more leverage.

If you have debt to pay off also you could do a HELOC possibly.

Here are the numbers (rounded up):- Original purchase price ~ $180K- Current value ~$230K- Remaining balance ~ $140K- Mortgage payment + HOA ~ $1,300- Current rent = $1,700To calculate ROI at the current time should I base it on the initial investment amount (downpayment) or the current equity position?

Based on the train of thought you shared you are completely ignoring a critical piece of the equation which is your own capabilties and whether you have the ability to execute on the opportunity.

In our previous discussion, we delved into the effects of interest rates on small businesses, but it’s worth noting that these rates also have considerable influence over larger enterprises.Corporations are facing a daunting challenge this year, with roughly 33% more debt to refinance, totaling a massive 1 trillion dollars or more due in each of the next four years.

Based on what you learn from the application you'll have an idea of how to proceed.

Overlooking Proper Market AnalysisMany hosts set their pricing based on intuition rather than data.

I have had good luck with painting cabinets. scuff sand, take off hardware and ask the people at sherwin williams what they recommend for paint. probably something oil based.

A DSCR loan is more based on the asset's revenue potential, not your personal qualification, so if a vacation rental/Airbnb property can make money, you might qualify.But even if you could get a DSCR loan, I'd question whether you should get a DSCR loan. 

The Housing Authority calculates what each individual tenant is able to afford based on their bedroom needs and income.