Even with short-term rentals were hedged with long-term, having 100% vacancies for multiple doors of anyone's portfolio may strap anyone's cash reserves quickly, except those sitting on uninvested millions in retirement accounts and 0 debt.

I am trying to help my mom invest into real estate as she is getting close to the age of retiring and I want her to be financially stable.

The price will be stable until it isn't and then the movement will be sudden.

No, she is not retired but she will be contributing for the next 30 years.   

Why not go to an Opp fund and park your money in that stable area?

One actually did pretty good and I used him for about a year before he retired. 

Or they just worried about the stable of income?

I bought a lake house in July 2016 with the original intent of renting it out and then possibly retiring there in 10 years.

It's still not as stable as a tripod but it at least stays up during a slight breeze.It's very simple.

.- I have some properties under my name as sole proprietorship, one under a single member LLC (disregarded entities in Pa) and I am separately an independent contractor (real estate agent since I retired last year).