Self management questions

[Wendy Carbone]

Hello all, I hope someone can help answer a few questions for me.  I have had 2 rental properties for 10+ years and have used a property manager for the entire time since I live several hours away from them.  In May, I purchased another SF home and I have a 4th SF home scheduled to close next month.  These last two houses are within 2 miles of my home so I want to self manage them.  My questions are:

Should I create a separate LLC management company and do I need to be licensed to do so?

All properties are owned in my name and husbands name but have an umbrella policy to reduce risk-no LLC.........thoughts?

What is a good resource for a lease agreement, tenant screening and rent collection?

Other than a minimum credit score what other specific stipulations can I legally make to help get the best tenant possible?

Thanks in advance for all your help!!