That's sort of how I started. I had a bass that was worth too much to mod, but not as good as I wanted it to play. I found a good quality "player" bass that I modded a little, then a cheap bass that I modded a lot. Then a kit to fill a niche. All of which prompted thoughts of "well, what do I really want, and how close can I get to it?" and "I wonder what niches I still have to fill...?" The trick is scratching the itch while not risking divorce ;-)