First offer accepted!! Please help.

[Jordan Sitzler]

Hey, all!  I did a gentleman's agreement and he accepted my offer.  I'm going to get a purchase and sale agreement form to him tomorrow.  We agreed to split closing costs, I'd take care of septic inspection, and I'm tearing down the mobile on the land.  How do I proceed to title?  How long should this process take, and what all do I put on this purchase agreement?  I'm a greenhorn, but it's a deal (I believe) and I'm wanting to act.  My brother I'm hoping will be my cash partner, but any advice on that I'd gladly take. 

60k is the price.  I have 25k stashed but I'd prefer to use more of financed money, I just don't think I can get it within 15 days.  I'm hoping to close May 1st. 

How do I do septic inspection?  Anything else to look for?  They owe 3000 in back taxes, and they said that can be taken care of at the title transfer.  This is my first deal.  I plan to just purchase straight from the owner and no agent, because he isn't willing to spend the money on one, and I'd prefer to save a few grand on a cheap property when my offer has been "accepted."