Here is a link to a news story.http://www.wearegreenbay.com/news/local-news/local-5-investigates-rent-to-own

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

The question is, is the "problem tenant" violating state or local law or the lease agreement? 

Check local and state regulations and what might be coming soon for building standards and regulations for a RCFE.

Yes you can get a HELOC on your primary residence even if its 2-4 units it depends on the bank.Try a local credit union because some banks or CU's will only do them 1-2 units, but there are ones that open HELOC's for 3-4 units too like BECU.org.

Check in with @Joseph Chiofalo he's a FL mortgage and RE broker and can point you in the right direction for a local RE broker.

Getting into multifamily will be much easier after your first deal and your local team is established! 

The best thing I can suggest is to call around to local banks in your area (at least 3) and ask them if their bank can do this for you. 

Partnering with Seth Choate provided valuable local insights, making this an attractive and strategic investment for Partner Driven.

Hopefully some locals will comment with more specific information to your area.