I Would not buy the Kickr Frame, because it will not work with my Kickr V5(because Wahoo won’t update it) and it would make my Kickr Climb useless. So I would looking at get a cheap regular bike frame.
I was in the same boat. Found a nice aluminum bike, and bought myself the Kickr move. The bike was $700, the move just went on sale. (I was lucky enough to get one before they sold out). I had to buy a boot for the climb. But it’s lovely. I really like the new setup😁