My advise to you is to save as much money as possible and eliminate whatever expenses you can to save up for downpayments.

That's because cashflow is what can help you scale when you are starting out, and it's also what saves your butt during tough economic times. 

@Kevin Si27.5 years is the number for the the residential depreciation schedule...Maybe you are using some irs calculator trying to help with retirement "stuff" (i didn't know irs had online calculators) with assumed/entered factors.

In order to make that happen, we are considering selling the land and taking what little profit or equity from that sale, and saving up to purchase property in this other location we decided would be more suitable for our retirement.

More savings.

I personally wouldn’t rely on monthly cash flow to “save up” for that balloon payment either. 

Ended up saving a decent chunk.Who did you use? 

For example, interest only vs. interest and principle vs. interest, principle as well as a certain minimum % of the loan are all types of payments I've see on lines/loans of credit.

It seems most of my tenants want every windows completely covered anyway, so you can expect them to just leave the curtain pulled over the window most of the time.Here is an example I found online, but I put my rod higher up:

There are many neighborhoods in Houston that score in the 70s and up on AirDNA, so it is a good market, but you need to be precise about where you're looking.2 - the submarkets within houston that perform well for STR are nowhere near your price point. continue saving or choose a cheaper market. you're looking at the fourth largest city in the US, and the biggest city in the most moved-to state in the union.