You want to learn and you want to be prepared for the test.

If this guy comes up with a great asking price for all units, who's got some creative ways to come up with some money for a down payment?

SFR investing does not prepare you for MF investing!

I think you need to continue educating yourself to better prepare for RE investment.

I feel well versed and prepared with all except my abilities to copy and paste pictures, etc.

I am aware that I will need to live in one unit for a year, and I am fully prepared to do so

I've done dozens of deals without much if any money at all, and it made me a more creative investor.My number 1 piece of advice is this.

Most landlord/tenant court cases can be handled without a lawyer if you're well prepared (which it sounds like you are) and have your documentation organized.Since it's a decent amount of money, you may want to consult with an attorney, for a few hundred dollars I'm sure they can give you good advice.It sounds like you have a good case. 

I am curious to see if there are any creative ways to to get a HELOC on an investment property.

You should rethinking whether you are prepared to take such high risks.