as a guide, most of mine was 2nd hand

pace 500 cooler £150
t34.55 £375
siemens £150 (brand new, imported from the US, cheaper )
3 map bar £35
MSD chip (not live map) £300 ish
-31 actuator £30

set it up myself, 2 bar of boost, estimate 360-370hp

will be alot more expense to have a live map & new turbo, that's would be best part of £1300 alone

stage 3 doesnt necessary need a live map; but as ever its the best option.