Granted, you have a chunk of cash invested but with that many airplanes on hand I wouldn't worry about replacement parts. If there is one that you just really enjoy your best bets are to hit all the swap meets that occur within a day's drive and start asking around among local fliers to see if they have crashed or partial airplanes sitting on a shelf somewhere. Facebook market place often has a lot of old models although the are often over priced. You don't mention what radio system you are using but they almost all have some version of a stability assist receiver these days. If you are worried about getting your reflexes back these receivers are a big help. Don't be ashamed to have somebody buddy box you until the muscle memory comes back. Throw some fresh batteries in the transmitter, get a couple of new Lipo's for either the Cub trainer or the Apprentice and get back in the air. Remember, foamies can be repaired. Bamboo skewers and Foamtack glue can fix a lot of mistakes..