My MS setup cost me about £530 with brand new ECU, loom, and injectors, Mark's would cost him about the same, use his existing EFI TP, CLT, and ACT sensors, and just fit a CPS setup (trigger wheel, bracket and CPS).
All you need then is one of the many tried and tested people on here who can map MS to do it for you.
About £1000 cheaper, no need to use a 15 year old ECU and loom and just as ready to abuse