So it seems that the general consensus is:
1. Car would be competitive in ITA
2. Car would also be competitive in ITB.
3. Legality of the car is somewhat in question in ITA because of the lack of the sunroof which we have to remove regardless.
4. Much more expensive to build vs. buy
It is way more expensive to build than to buy. I went against the very good advise from the very best mentors on this site and built a car. Money poured out as compared to buying on, easily 2:1 and 5 digits came in a hurry. On top of that there was an entire season of trying to get stuff right and a bunch of missed events.
That said, I made the right choice for me to build. For me, the experience was totally worth it as I had zero car experience prior.
However, my next car....will be purchased.