I was trying to appeal to the next generation with more app-based management rather than phone calls and emails.  

A good gauge of performance for a full time rental is roughly 10% of valuation (A $1M home should generate $100K+ in gross revenue.) 

If your properties are generating solid cash flow or have appreciated significantly, you might be following a “smart leverage” strategy, à la Grant Cardone.

Investment Info:

Mobile home note investment investment.

Purchase price: $64,250

Cash invested: $12,000

Sale price: $175,000

We purchased this mortgage note and ended up foreclosing on the proper...

This can put a significant strain on your finances and cash flowThey also often require a large down payment themselves and may have a strict repayment schedule that can be difficult to meet, especially if there are unforeseen circumstances or delays in renting the property or generating income from itIn addition, relying on this type of loan may expose you to higher financial stress and the possibility of default if you are unable to meet your loan obligationsThe final decision depends on your overall financial situation, risk tolerance, and your ability to manage the associated costs and obligations

Firstly, it often generates higher rental income compared to long-term leases, particularly in desirable locations or during peak seasons.

Even if it does, there's closing costs to consider.As I said, I have no cash myself, so I'm asking how I can deal with generating cash for closing costs (and a down payment) if it comes to it.The house costs $139000.

Well, STR can work well for people who own a vacation house for personal use, and just want to generate some extra income when not in use.  

When I use AirDNA I do not focus on the algo generated number too much, rather how are the most comparable units doing. 

-Cons: On sale of property, the new owner would have to start from scratch on the income generation.