Thank you for answering my questions and addressing our posts.
Are the repairs necessary for habitability? Or are the remaining repairs exterior additions only (like porches or stairs)?
You can sue the seller. You can hire a contractor to finish what was not completed and seek reimbursement of these costs in court.
You might want to have an attorney send to the previous homeowner a letter demanding completion of all work by X date, followed by a lawsuit if the time limit given is not met.
Good luck.