It wouldn't be too bad to separate. The trickiest part is the hv to the flash-lamp, you could probably find some good high voltage high current cable for this (think 8 gauge neon sign cable). all of the other stuff is low voltage and low current ( the oven takes some juice but it isn't too bad). You will have to get some good coax for the q-switch.
Now the head floats on the tub to reduce vibration. This system is a z fold resonator and is pretty easy to knock out of alignment. there is also quite a few adjustments in this thing so it does take some time to get aligned optimally.
Another thing, If you have ever had your fingers in say, 5 watts argon you know it pretty quick, if you get your fingers in 150 watts(rms) 1064 you get instantaneous burn and smoke! You HAVE to have some good 532/1064 glasses not optional!!! heck out of the yag HR you can get ~20 watts. If you put black foil in the 1064 it buzzes from microns of AL being ablated.
As for $100,000 for the conversion... If he paid that please give him my email address i will be happy to do another one for him, i will even take 25% off!!
Figure 1500 or so for good cable, good hoses, good quick connectors, a solid enclosure for the head and all the mis crap that you don't know that you needed.
I don't mean to sound so pessimistic but i have used these and they are a pain. They are also big boy toys and can F u up pretty fast if you don't know what you are doing and it is easy to mess up the ktp if not aligned correct. So Be careful... Oh yea i also wouldn't extend much over 10 feet any more than this and you will start getting into all kinds of inductance and resistance problems with stuff (thermistors,highvoltage, heaters, power sensors...)
Chad