You will learn a lot by doing this.They are probably going to take measurements for flooring and drywall, count any doors that need replaced, look at what appliances need replaced, outlets, fixtures, countertops, etc.

You could take them to small claims court, but even if you win, you're unlikely to see the money and will have spent a lot of time dealing with it. 

It doesn't happen all the time, but it only takes getting burned once to want to change your policy.

My wife and I want to take it over along with her sister and brother in law. 

Although just south in Silicon valley when one firm moves 2 take its place..

Since you are beginning to acquire multifamily properties, you will be taking a loan under your own name i.e. you are the guarantor.

And if so, what steps would you take first, and how would I go about reaching out to the landlords.

It feels like it's going to take a lot of research to get started. 

For me to go through the due diligence myself and then if I did buy the property going through the zoning and permitting process probably takes more time than I would want to take and would rather deploy my capital elsewhere.

Congrats and good for you for taking action!