Really depends what you start with. Mine cost best part of 1500 and that was with no labour. But i had nothing to start with. So spent best part of 550quid on exhaust. Then had to buy a gearbox/mounts etc because i only had an 8v not a 16v. Then hydro parts. Clocks etc. But i also spent extra because i used alot of new sensors and things. But if id started with a valver i wouldnt of needed any of that.
Then fmic, silocone pipes, service parts like fiters and timing belts etc. It all mounts up pritty quickly. But you could do it pritty cheap too, depending on the car you start with and how sh!t you want it to be haha....