I bought an orange Solaris frame and built it up with new forks, wheelset and some secondhand stuff and what I had, er, lying around and rode it, oh, four times then sold the frame (and a couple other bits) to my mate. You know, just to try the 29er thing… In fact I bought the rest of my mates bike on his behalf and built it up for him.
I then bought a Rocket frameset, and built that up with a mixture of new and old bits (and bobs).
I then bought a green Solaris frame 😀 and built that up with a new XT transmission and the ‘spare’ bits left from the orange one…
ETA : that’s on top of the pre-existing Soul and Giant TCR C2…
That was 4 years ago now but pretty sure that would be the most in one year.