At least.
Super speedway primary / backup cars for a 36 entries - 72. Same for Intermediate, short track - 154 more and better get busy on the road course variants, stuff for the unchartered, more stuff to replace stuff that gets crashed and after Daytona, some way to do 9 front clips, 6 rear clips and a couple of front / rear clip combos before Talladega in 2 months. Better get those done early so they can be re-certified, re-bodied and re-inspected so the hauler drivers can get them to the $ 1800/hour wind tunnel for a quick half day shakedown.
Dallara or another independent builder would require a facility in the Mooresville area ( where NASCAR chassis certifications are performed) big enough to house a minimum of a dozen chassis fixtures, MIG welders, TIG welders, bottled gas storage, steel inventory, offices, employee facilities, etc., etc.
The manufacturing facilities are already in place ... all over town ... staffed by experienced people most of whom are infused with enthusiasm and loyalty to team.
Given sufficient time, professional auto racing will become an expensive form of adult T-Ball.
Just my opinion, of course.