@Andy GibsonMake sure you work with a fee-only financial planner who is a fiduciary.

Consult an estate planner to decide.

@Luke Eastman what's probably more important, is to speak with an estate planning attorney.Your mother should probably have a Trust, to avoid the properties having to go through probate when she dies.As part of the Trust, the estate planner may recommend an LLC or not. 

Of course, I am not a financial planner, this is just my personal opinion.

In general, I price myself 10-15% high outside of my avg lead time, and discount fairly aggressively inside the lead time.This strategy attempts to capture both the planners who will pay a small premium to secure a good data ahead of time, and the last minute deal seekers.In general, it seems many people don’t vary between weekend and weekday pricing enough IMHO.2 ideas I’ve toyed with… in 2+ years I’ve never not booked a weekend.

City planners advocate for this sort of treatment to preserve the ratio of homeowner to renters, or planners are attempting to change the direction of investment in their city altogether.  

You should also connect with a tax planner/CPA regarding the pros and cons of having an LLC vs trust vs individual.

A good lender or financial planner is going to do something similar.

As a financial planner, I generally recommend clients build up a personal emergency reserve before investing.

I currently have a site plan, rough drawings & have architects, contractors & planners working through this process.