Matt.
Tyres are subjective as above. I used a new set every race weekend 28 f&r. Max power on an A bike is 65bhp. The series cost wise is similar to cb 500 or steel frame 600 racing unless you want to throw tonnes of money ( as some do
) at the engine to achieve the magical 65bhp.
Excellent paddock and great racing you won't regret it.
Neil