@Reece O'Bryan - This applies to pretty much all loan types, but yes you can use 75% of rents from legal units to qualify for the loan.  

Welcome to BiggerPockets @Billy Grace Looking forward to see you around!

When you say he is on the paper work ... you mean you used his credit and finacials to qualify for the loan.. and he is as stated an owner of record.If you can't work it out.. a mediation service may work well for you.. your not the first one to go through this stuff.. you also may be deem married in common law.. depending on your state so the break up would be handled just like you were married. 

Accountant Find out if you’re getting write-offs, tax advantages and if you’re qualified to receive higher loss limits by spending 750 hours or 50% of your time self-managing.9.

The key element is that you must have a Qualified End Buyer under contract at the time the loan is made. 

But with an income of only 30K, I'm not sure if I am going to qualify to keep the house in CA (which is valuing at an outrageous rate right now) and also buy another property to live in.  

So, if the property is...unique...and doesn't qualify for a conventional loan, a portfolio lender may decide the issues are no big deal and make the loan.If nothing else, you can at least plead your case to a portfolio lender!

I was very candid about my intentions with my loan officer.Now, based on my income and situation, my loan officer told me that I qualify to purchase this home as a second/vacation home.

In those circumstances, you'll have to do the qualifying underwriting and otherwise be in compliance with DF.  

.- I would like to position myself so that I could be able to work on similar deals with my business partner in the future.Any advice, including tips on finding a qualified CPA/Attorney to work with and working with someone out-of-state, would be much appreciated.