I just want to know what the plans of action they should take.Thanks!

What actionable steps should prepare a newbie to pull the trigger when property prices drops again?

Great job @Jessie Harrison on taking that first step and actually taking action!  

Do it when you are most comfortable as long as you are managing with your present income.Having a young family is extremely demanding and time consuming, investing can wait till the time is right.

This is because the IRS assumes that when you use the building (as a rental) a portion of that building will get used up "consumed"; such that after some time you will have to repair / upgrade / rebuild.

As a seasoned property investor, what would be your course of action?

You must document,documents all damages and by all means let the son know since he is responsible mothers actions.

Does anyone else have any suggestions for the course of action?

You  will  need the help of an attorney and account the question to ask  to be able to do the creative structuring  of your partnership  with a plan of action  a organized  plan of action and  aware  of the pitfalls  and opportunities  just doing this with family will not  be enough  you will need  professionals who know the laws  of syndication

I'm not saying what she is doing is right, but if you take action like cutting the cord or removing the washer and dryer, she might just up and move on out.