You are absolutely right building the car is fun, collecting the parts, its like Christmas every week.....however there is a tipping point that comes in the build where you are spending beyond the value of the car regardless of what you do next.
When you build a single from a good stock base you have so many additional things to think about and not just the engine, I wont go on its been discussed on there so many time, then you have to think about the labour because if you can not do it yourself you need a RESPECTED garage to do it
Then the ECU and mapping, followed but a few brief months of excitement as you revel in the power..... then you get used to the power and want more etc etc
I want to factor out the above and buy a very well put together Single, be it from Japan or here in the UK, not bothered, as long as it passes a very strict inspection
I have built several singles with different tuners and the costs can become unbelievable if you add it all up, my R23 must have owed me £50,000 and my Black TT6 well over £40,000, both great cars but boy was the journey a tough one, in the end they both sold for less than what I paid for the original car before the work, see where I am coming from !
The Single TT6 just before I sold it
My R32 GTR 2.7 stroker just after rebuild