Danny, I do not take kindly too been called an idiot thank you, I a not trying to offend anyone, nor mislead, I am speaking from personal experience here.
I have done a very similar job with my car, V6 VR4 (see www link), I did it myself, with a lot of research and asking people questions. Yes it was turbo'd in the first place, which did make it easier for me. But the way in which I positioned the turbo and built the manifold is applicable to the FTO. The way I did it, is not the most *optimal* way for the turbo to sit, because the rear bank of cyl's has a longer distance to travel creating non-uniform exhaust pulses, but it does make the car sound similar to a six cyl Subaru

. The ideal would have been to go over the gearbox as you have done, but doing it that way would have added considerably more expense, moving fuel lines, repositioning the throttle body, shielding electronics etc.
Granted the FTO is a different car/engine, but the principal remains. Low boost high compression, greedy e-manage and the standard ECU, the factory injectors should support 150kw at the wheels standard. Of course there maybe unforeseen problems, but I could not see that been from a mechanical side, the only unknown factor for me in the turbo conversion would be the ECU side of things, which I, or who ever would have to *research* more into.
Forgetting my car is not an FTO, but of the same engine family, here is a shopping list. These are prices I paid and are estimations because I do not have the actual prices in front of me at the moment.
$600 TDO5H BIG 16G
$300 EVO intercooler (I have a hybrid, but an EVO cooler would be better)
$800 Manifold and exhaust modifications
$800 for intake modification, piping, Samco, intake for the turbo etc.
$800 for piggy back computer. (e-manage supports ignition with optional expansion)
The greatest saving came from attempting this myself, labor is the killer of the budget. But for some one with a bit of mechanical knowledge it would be great too try. The feeling of success when it works is indescribable.
Of course, if you do it yourself there's no guarantee it will work, I had many sleepness nights wondering if this was going to work... and it did, very well I might add. There is no harm in trying something different, I just added another way/idea to the pot for people to take inspiration from.
Now I built this in NZ. I am sure the prices would not vary that much in regards to the fabrication of exhaust and intake. Instead of going to a specialized performance car shop, I went to a general engineer for the manifold, and a normal exhaust shop for the intercooler piping, it is amazing the difference in price you pay.
I am saying it can be done for that price, as you said, there's no guarantee it would work, the way I did it is not be for everyone, some people may prefer a drive in drive out kit, this is just another option/avenue, a little ingenuity goes a long way to saving a lot of money. Think outside the square.