I agree with @Chris Seveney that a performing note would be a very good starting point.

Congratulations on deciding to take a big step by introducing yourself to the forums - while everyone is friendly and looking out for your success on these forums, I remember how intimidating it was making my first post introducing myself to the community 10 years ago and before I started working here. 

Has anyone had recent success finding a bank that will offer a Heloc on a single family investment property in Jacksonville, Fl?

Heck, I don't even know how successful my mail campaign could be .

Success stories, fail stories, etc.

It sounds like your house hack was a success after securing the FHA loan and renting out the second unit. 

I have 2 black belts, one in failure and one in success!

This is a big project, and understanding the financial analysis side is essential to making it a success.

I’d love to hear your strategies and any examples of when you’ve successfully adjusted course!

Small multifamily, up to 4 units (at least to start), then graduate into larger investments as your portfolio performs positively.