I suggest what 89retta said. If you live on a lake that is big enough to have a marina there should be plenty of boat owners. Put up an ad at the marina for help with getting to the drains. Always someone looking to make a couple bucks and some that would gladly do it for free
Here is my marina. They always seem to have trouble keeping a mechanic. We actually have a Facebook Private Group for the Marina. I might try post there.