What kind of savings do you guys have in addition to the income savings each month? 

I invest with PPR and other income funds through my IRAs.

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.  

I would underwrite buyers based on stability of income, financial payment history & ability to pay.

This is all depending on your credit and income meeting the guidelines of course.

I have now replaced my old corporate job income and expect to make over $70k cashflow off of my 31 unit portfolio while also having the time I want to be able to enjoy sailing, camping, hiking, and hunting.

Projected annual income is 20% of the purchased price.  

I currently don't show income and just left my other place of employment.

But I would remain open to long-term rental as an option as this seems like a more stable option in terms of income, again this may be my inexperience talking.However, I have always  been somewhat risk averse and investing in real estate is always a big venture, in my opinion/experience, in terms of capital.

Just make sure the bed/bath count is correct as it can affect the income drastically