Roofer finished project, but I asked them to repair some tiles that where popping up on roof ridge near completion, and to connect the two attic fans they installed. They said they'll come back to finish out - 3 weeks later nothing. So, I nailed down the 25 roof tiles and hooked up the fans. Now the owner wants the final $1800 payment. I'm at a crossroads - keep it, share it, or make an offer of settlement. His take "I'll have to place a lien on your house." Where do I stand legally in Travis County?