Try to find the best T Arrow you can, i.e. low time engine, last OH by a reputable shop or factory reman, good avionics, especially autopilot, Merlyn, and intercooler, paint and interior, they are out there! Good luck
Hindsight 2020 gave you good advice. However, having owned 3 different T arrows, and thousand s of hours therein, I think the Merlyn wastegate, and intercooler are worthwhile mods. IMHO