However, in most markets I would assume an additional full bathroom would not only command higher rent, but would increase the equity and appreciation.

It seems like there should be sellers that would be willing to take their equity or at least a portion of it in trade for bitcoin.

Here are a few high level thoughts for you as a beginner:-Don't lend in second position-Don't do deals with new investors-Don't experiment with new strategies, even with experiences investors- ie, don't jump in to a first development project with someone just because they've flipped 20 houses. 

Some positives and negatives to evaluate. 

My plan is to maintain the status quo and benefit from annual rent increases and equity gain as the tenants' rent covers the mortgage.

My plan is to maintain the status quo and benefit from annual rent increases and equity gain as the tenants' rent covers the mortgage.

Hey Claire, since your property is paid off, a HELOC or cash out refinance could help you access equity to fund another property.

People have relocated from across the nation for some of these positions and have nowhere to go or nothing to do.

Maintenance/cap ex, insurance, if a rental PM, bookkeeping, misc.The fact you have a loan means 1) leverage 2) equity pay down.In addition, there are tax benefits.So I will do some rough underwriting as an OO non-rental at 95% LTV (because FHA has some undesired consequences that make the 1.5% difference in LTV worth avoiding the FHA).equity paydown: 20% (using OP interest rate at 95% LTV and not counting closing costs). 

You will find that people are successful in every market you mentioned but depending on your cash position, a successful rental in one location or the other might not be as ideal for you.