Frameset + cockpit was $620, painting was $80/colour. Full build excluding wheels came in just under $2100:

Component   Item   Price
Frameset   Winow TT917   $620
Frameset   Frame Painting   $160
Saddle   Specialized Sitero   $86
Bars   w. Frame   -
Stem   w. Frame   -
Chainring   AXS 48/31 Part Out $51
RD   Rival AXS   $110
FD   Rival AXS   $106
Batteries   Takewell   $23
Crankset   Zele-A12X-OS 150   $47
Chain   Force AXS   $25
Bar Tape   Fizik Tacky - Red   $25
Levers   RideRever Triva Hydro   $281
Cable / Hose Damping   Amazon Brand   $9
Calipers   w. Levers   $0
Bottom Bracket   ZTTO 24mm BSA   $12
Pedals   Look Keo2Max   $80
Shifting   eTap Blips   $168
Shifting   Leap Components Blip Mounts+Buttons   $72
PM   Quarq   $270
Garmin Mount      $72
Coupon   Anniversary Sale   -$120
Coupon   TopCashback 40   -$40

Saving by going w. cheaper pedals, saddle, mech v. hydro levers, or 11 spd Di2 would probably get you down to $1.4k-ish all in. Even less if you don't care about shifting from the basebar and do full mechanical.

It's not a bad price for a full electronic TT bike. It's crazy how other manufacturers will probably charge this for 7-11k. I'd rather build it and enjoy riding what I built.