I would recommend refinancing the first 4 with a portfolio loan to get it off your credit report and then you wouldn't have that issue anymore. 

Suppose the worst case scenario transpires, can you borrow from a 401k or credit card at a reasonable interest rate, sell some stock, etc.?

I am deep in credit card debt and we live paycheck to paycheck.

Keep in mind the interpreter hasn't made payments on time under his fraudulent agreement and my client received several foreclosure notices during this period. 

I have a HELOC I use, and two lines of credit, but I use them for short term projects.

Just got a notification for my credit report that the account for my loan was closed?

You could take a personal loan to cover it, or a line of credit on your primary home, if you have equity

How do i go about doing this with bad credit?

Your credit scores will be an issue, outside of an fha loan, but the action by the neighbor should be irrelevant.

The reason I need to search low down payment options is I have minimal to put down but my wife and I have 720-740 credits scores so assuming the property shouldn’t be to hard I’ve read that she could carry the note for the spread from mortgage payoff to sale agreement?