Principle and all remaining interest due upon maturity of loan.

We would be tying up all of our capital(including reserves) to do a deal by ourselves in cash.

Was wondering if I should pay a portion of the student loan off and use the remaining cash for investments that will in time be able to pay off the rest of the loan?? 

If you remain living in your current primary, then you will need a standard investment loan, which requires more down.  

I'd be borrowing against my 401k for my portion of the down, my other brother has cash for his and 3rd brother is tied up with stock waiting to vest.

Responsibility for damages remains with the seller until the day of closing.

I've never had a good experience dealing with anything tied to an association long-term.

It is likely they require both rental agreements and read that the tenant has months remaining and require proof you get one to move out.

When WF offered to refinance a house  on which I only owed 55K they wanted about 5K in closing costs even though I wasn't taking a cash out and the mortgage length would remain the same.

In addition, I know that if you don't follow each letter of the law it may require you to start the eviction process from the beginning, providing him more time to remain in the home and costing you more time and money.