They have a liability for a full value of my property plus I make them have personal property for $30k. is it advisable to have the insurance underwritten with tenant and my name on it?

Specifically STR build to rent. 

The problem is no one book is going to be detailed enough for your specific state and county.Right here on BP there are lots of discussions about tax liens.

Are there specific features traveling nurses value most in a rental?

@Cristal Ochoa @Leiah DotlichI will preface this with the fact that I have a legal background, specifically with estate planning and asset protection.

Do you have specific numbers to share with the forum, particularly with respect to your in-laws house?

One capex issue or tenant turnover is going to eat up years of "cashflow".I would advise you to work on getting a smaller number of high quality units rather than scaling to 20.

Speak with a CPA specific to real estate to get assistance.As others have mentioned, cost varies depending on location. 

Those effected go well beyond the property owners, the economic contribution of RE and subsequent economic loss in the form of: management, maintenance, landscaping, caretaking, hospitality, tourism, contracting, designing, pools and gardening is economically catastrophic and will reverberate well beyond specific zip codes.

Let me know if you need help with specific tools or anything else.