How do I make more money in Real Estate,  I believe AI would come up with STRs as an alternative.  

If there's an alternative method that has worked for you, please share. 

As an alternative solution, we've placed QR codes in the units which takes people to a form they need to fill out with all the information they want to collect.

Have you thought about investing in gas and oil with about a 9 to 10 % roi.. its a 1031 exchange alternative of like kind. 

You may also find certain markets where alternative rent strategies (MTR, STR, rent by room, etc) produce enough extra income to justify the increased work involved but the difference in income from the different rent strategies in many markets is just sufficient to justify the increase in effort involved.$100k is going to be challenging in coastal CA cities.  

Your other alternative is partnering with someone who has the W-2 / who is loanable and they can make up your lack of W-2 / income.

But I always like to point out what I think may be a good alternative for small investors owning less than 5 currently mortgage properties.

It definitely depends on a lot of factors - where non-QM is generally going to be about 0.5%-1% higher in rate, but can be more than that or even lower than conventional with some more options - one in particular is if you did a longer prepayment penalty period (5 years - at a descending penalty structure or even 5% all five years), then that could drive the rate down even significantly lower than the conventional alternative.

I'd like to start small with 1-2 STR tiny house(s) or other less expensive "alternate housing" options (yurt, airstream, etc).

@Dennis Nikolaev The only alternative I can see is to Short Sale them, if the mtg balance is higher than what you could net from a sale.You will need to talk the Loss Mitigation dept of your lender and hire an Experienced short agent, they will know what to do and how to handle the process.