Renegotiating a deal

[Akston Pots]

Hello BP!

I recently got a property under contract. I had the inspection done and some unforeseen issues were discovered--nothing huge, but things that will have to be addressed before I can proceed with my original plan for a value play. 

I want to renegotiate the contract but don't want to lose the deal. My question is this: if I begin trying to renegotiate, will I then lose the right to close on the deal at the original price? I ask because I am willing to pay the agreed upon price (resist the urge to tell me that if I'm willing, that I should just close) and don't want to muck this up by trying to make a good deal into a better one. At the same time, the inspection revealed some things I hadn't expected and the place is now worth less than I previously thought. After having seen a copy of the inspection report, I hope that the seller will agree with me.

A bit of background just in case: this will be a 24-unit, under contract for $850,000, scope of investment needed to address newly-discovered issues is $15-20,000.

Thanks in advance for your input!