If you do skip this one - no big deal - continue with the plan to build up reserves and pay off short term debt. 

Then with the equity you build up through loan paydown and appreciation over the course of a few years you can cash out refinance and use that money to snowball into another property.

My only concern with shower doors is that I've found that most tenants don't properly clean it as they are a bit harder to get into the tracks and everything so there may be a bit more mildew/soap scum build-up than what you would see with a curtain. 

It's possible to build up a portfolio with time.

There was moisture buildup in one wall so severe that the wall was soft. 

I do need to build up to that positive cash flow at the 10 year mark.

That company helps you set up your LLC structure and does some credit coaching on how to build up a business LOC. 

Attend your local REI meetups to build up a strong network and feel free to reach out and connect with everyone in the community.

With it being such a unique property, I bet you'll start getting repeat customers and as you build up positive reviews and the same people start booking it again year after year, your schedule will fill up more.

It doesn't look like you would be getting much from the sec121 exclusion.Not sure how selling this property would get your more funds into your Roth IRA, unless it just because it frees up money to make the contribution..If you need funds to build up a reserve / rain day fund / etc., this might be a way to go...