Purchaser says they are closing on another property right now, and as a result won't have financing until the agreed upon time for purchaser to payoff the remaining balance. 

Understanding the difference between Balance Sheet accounts (snapshot in time) and Income Statement accounts (changes over a given period of time)3.

Raleigh has higher prices but higher rents and strong demandGreenville has lower prices balanced off by lower rents and steady demandDo you think Raleigh can continue to grow the same as it has over the last 10 years?

I will also need to raise the balance of the down payment from passive investors.Can anyone tell me how I would go about structuring such a deal?  

This can be a tough balancing act sometimes, because you want to move and take action, and you know that the only way to learn is to take action.  

At $30k loan, we can rotate them using 3% balance transfer with 0% interest for 12-18 months from credit cards to credit cards forever.

Prepaids and escrow account balances can skew this number. 

You are in an amazing financial position with that home, only needing to pay interest, and risking that for a business that may or may not go as planned does not seem smart - have some patience and simply wait to invest the principle balances you are saving each month.7.) 

Specifically what is the mortgage balance and do you have tax returns?

If they are low, I think the complex is more likely to be flexible.I would start by offering a move-out date of March 15th and 50% of the remaining rent balance and see what the response was from management.