Consultation on old, overgrown fruit trees

We are looking for a fruit tree expert, ideally someone with experience with very mature, old trees to give us advice/consultation. We purchased a property about 4 years ago that has about 6 fruit trees (apricot, peach, apple, pear) and a cluster of plum bushes, but they are very, very old and may have some diseases/pests. We've done a lot of pruning and mulching so far but still aren't getting much fruit. We're looking for someone with experience with fruit trees to come to our property for about 30-60 minutes and just talk to us and give us advice on what we should do next to get them back in shape (if possible). It would be ideal if you could come out before all the leaves drop. Thank you!!