I am there myself. I have 9 turbine jets 6 radial engines and a dozen other multi cylinder engines all sitting in charge and fly planes. That's NOT counting the 12-15 arfs still sitting in boxes.
I am at a point where it is to overwhelming to deal with. I have not been to the field in over a year now, just to much work that does not outweight the effort. Its very sad as I used to dream about just having that TopFlite Gold warbird kit on the top shelf of the Hobby shop for $200. Now I have 20-30 plane at $3500- $5000 each and not much interest in going out.