I am in agreement with this plan. I am 60 working in the HVAC industry. My problem is I do not have the time or if I have the time I do not have the energy. I too look forward to retirement where I would actually get to build (not grow) my collection. I am at just under 300 kits with few duplicates. I do a bit of parts swapping with kits but not enough to make an unbuilt incomplete. I put notes in kits too for what was taken or added. As far as selling for maximum return on every kit, that is really a lot of work. It basically comes back to how much is your time worth.