Jon, I think bike transport will be circa £200, hotel £35 per night (no idea if that's per room or per person) flights are as cheap as chips, I'll have to check with the organiser about transport to and from the airport and circuit etc.
Jerez 6th - 8th May sounds great. Only thing is, I think Track Sense run three groups , and would prefer open pitlane or two groups. Focused Events are doing 4 days at Jerez from 23 April. This September's Focused Events trip was superb (open pitlane throughout), I think they might be doing three groups this time to keep the price down...I'll send a quick email to check out a few more details.
Not heard back from Focused Events yet, but it must be three groups, as the price advertised in MCN is £699 including Flights, Hotel and Bike Transport...not a bad price though....4 days at Jerez ? Nice!