Though you're not providing the main details such as fico scores, your down payment amount or DTI, I'll address your question.
Regarding closing costs, if you're putting down 10% or more, the seller can provide you a credit up to 6% of the sales price, or $56,400...otherwise the limit is 3% of the price
Regarding getting additional funds, that's a gray area as this would be considered a 'hold-back', and not all hold backs will be allowed by the lender. And it's doubtful the work will be completed by the close of escrow.
Since it was last Apr you posted this question, you've most likely purchased your home already..
If not, then feel free to contact me if you're still looking for a home loan!
best, Jeff M