tbh mate i think your looking at a bit more than 1000 smackers
cam is 200 pully 100 inlet 100give or take cable is a dealer jobby as motor factors dont stock throttle cables, well not many do, or unless you find one at scrappy so theres 10 to 40quid
then service bits so cambelt kit 60 or 70quid, water pump 30quid ish, oil and fuel filters, oil, and other service bits and bobs also head gasket and stem seals about 30-40 odd quid etc etc id say about 250 maybe more or less depending on where you get biits
then you will need head skim and fit stem seals, your looking at about 30-40quid
remap your looking at 400 to 500 or maybe a tad more if you go pred
erm maybe a couple of other bits too, oh yer if you cant fit you will need to fund for that too, and also if you go for pred youwill need to get car on a set of rollers before hand to time cam up properly too
think thats all mate
should see some good gains though, as for how much i cant really say you will need to find that out when u do it and get it on rollers, but rough looking at about 125ish maybe more id say