oversimplified, the price is what ever someone will pay.
There are few market subsets in the land of se7en ownership in north america. pick ur market. u can build little extras to cover some overlap with those consumers.
If u are trying to compete with Caterham, Birkin, and Westfield, the R&D on performance, maintenance, and livability must be done. From last years ToTD and the posts that u guys have kept us semi up to date, its reliable, Ke7in has testified to its performance on the street, and i beleive u said that u wear making weathergear for the SR27.
My biggest suggestion ties into the promotion of the car. articles and advertising only go so far. u want to get attention from the performance crowd, u must demonstrate the car at those events. Continue with attending Run n Gun and Ultimate Track Car Challenge. U may want to consider One Lap of America. thats a few events. take the ball that Caterham USA dropped (w/ the CSR) IMO, run the car at the SCCA Run Offs or Solo2 Nationals. Run in various NASA races.
Display the car at the large car shows where old money walks. Lime Rock Historics weekend. The weekend Cars and Coffee shows.
It will take a great while for word of mouth to bring up a new marquee to the level that Brunton and WCM have been able to acheive. but it will be another tireless endeavor that many of us think u will be successful in.
if u can have a barebones stage 1 turnkey for about $40k, i think its feasable. slow growth, but similar performance from Caterham has a higher price. i forget what a FM Westfield will cost to start out.