Audit recommendations

Hello SF community - Looking for audit recs. We do not need to pay for name brand audit - the goal is not to impress a buyer, but to check the box that its been completed... this may or may not include work for prior years where there is very little in terms of transaction activity. We will need an annual audit moving forward so not just a one-time exercise. Really looking for the most cost effective solution, someone that does great work at smaller firm I think is the best fit. It would be great to hear from those who have faced this situation. Thanks!