If the quality of work is good, then go ahead and release the final payment. Either procure somebody to examine the work that has been done or do it without anyone else's help through the span of a couple days so you can ensure you are content with the result. Only ever make the final payment when you are fully satisfied with the job and everything is completed as you'd like. Always keep a paper trail of all financial transactions to use for taxes and also other purposes, and know that it's not suggested to use cash as a form of payment.

Preferred Building Contractors LLC
4882 Lancaster Dr NE # 72
Salem,Oregon,97305
+1 503-877-1198
https://preferredbuildingcontractors.com/