Best wishes, and let me know how this turns out!
If your purchase agreement called for repairs, and if the seller agreed to your agreement with that provision in it, then the seller is obligated to perform those repairs. Alternatively, an amount could be put into escrow (make it 1.5-2 times the actual estimate for the repairs) so that you can make those repairs after the purchase. If the seller refuses (I'm not a lawyer, so this isn't legal advice), then you may have grounds to terminate the agreement.
Hope that helps.