Yep Dattodude is right the CA18DET conversion has been flogged like a dead horse, please use the search bar - there would hardly be a question that hasn't been answered.
My original plans were for this conversion, the budget was there, it was planned, everything was ready to go and the only thing that stopped me was the fact that I had to deal interstate which involved freighting a half cut(very Expensive)
but the main factor was that not one of all these so called reputable companies who sell them gave 2 ####s about something called "Customer Service"
Dreams and Goals are 2 separate things. Be realistic about what you want and how much you want it.
Thats why I'll stick with the trusty ol A15 for the time being.
Remember to that a budget is exactly that you will ALWAYS spend more than you prepared to because things just pop up
but you get that..........