When considering the cost of DD i reasoned it through based of the following,
1. Cost of the bike.Was going to change road bike which would of cost at least another£2000/£3000 on top of cost of current bike,and that money would depreciate away over next 2/3 years anyway.
Built race bike for under £1700.Its got to be worth that and for a while aswell
Road bike is more than good enough.IF you want to go fast do it on track
2. Vans and transport are all saleable assets at end of season
3 Time.Iwork a 60 hour week.2 kids,wife.Think of all the DIY you can get out of know your a racer
4.We are only here once.This is not a dress rehersal
5.I don,t think the bikes are slow.I was passing and leaving all types of jap multi track bikes at a Brands trackday.Its the corner speed that counts
Hope this helps