This looks like a hoot!

Single make tin-top racing on a very reasonable budget for a season ($12-13k, or ~10k British pounds).

125 hp "warm" hatches (Suzuki Swifts). Wish we had something like this here in the States.

 

A cheap one-make series would be a blast.
Closest we have is probably Spec Miata, but it ain't cheap.

Bad Obsession Motorsport [of Binky fame] did a series on buying a racecar & trying to keep it within to cost of sim racing. I recall watching it, but don't remember their final cost tally off-hand.

 

Love these racing series. Reminds me of the opening races in Gran Turismo, which are actually more fun than racing super cars.

 

If tracks here weren't so far apart, it'd be neat to see some cheaper series emerge here.
I've got 4 or 5, that I know of, in TX, but they range from 45min-4 hrs away. And I don't see a smaller series like this running at COTA, so that leave 3 or 4 smaller tracks like MSR [Dallas & Houston], ECR & I forget the other.

A 1-make with something like Honda Fits would be fun. Similar to Spec Miata, run restrictors on the later cars to keep it equitable on track.
But I'm sure it would spiral out of the 'cheap' bucket pretty quickly & end up in a similar place as SM is currently. Last I'd looked you could get a SM racer for $5-10k, but you won't be running at the front. A pedigreed car can run >$20-30k

Plus, from the little I've watched of some SM races, if you're leading at the end, you likely aren't winning
Bump draft passes just before the line seem the norm.