Sorry, but all you need for a televised series is a willingness to pay whatever they ask for the coverage. Plenty of categories have gone that way over the years, and in 90% of cases they can afford a season or 2, and then if it is successful the tv cost goes too high as the production companies get greedy. Think Porsche cup, mini cup, utes, fford, targa, production cars alone in the last few years.
Long term, seriously large sponsor committments of the sort required to build a $300k $uperlap car require multi year TV committments, and a track record of delivery.
Time attack has a long way to go before it shows it is anything other than the next big fad after hula hoops, yo-yos, and drifting.
There are seriously flawed fundamentals around cost and control competing at the top level, and if only 2-3 cars have a shot at winning a class, the other 10-12 cars spending 50-100k are going to disappear very quickly. Also there is no attempt to link state based feeder series like the existing supersprint/time attack champs, and national travel costs are a killer for most self funded competitors.