Budget would be around 5-10k including the car purchase
Thats a pretty wide range TBH mate.
5K = buy decent base car for 2.5K or so (tidy cup for example as you wont want aircon etc)
Decent engine service with cambelt change 500
All new balljoints and rods and rod ends and wishhones and wheel bearings 500
Coilovers and uprated top mounts 1000
Decent brake pads and disks 200
Tyres 300
Thats the whole budget gone, and you've not really started modifying much yet, my mrs daily driver would still beat it, so not really what I would call "ultimate epic" spec TBH!
If you had 10K instead, same thing but add:
Cams (500)
Bodies + management (2000)
Mapping (500)
Engine internals upgrade with supertech valves, ARP bolts (500)
Quaiffe diff (1000)
Bucket seats and harnesses (500)
Still pretty modest spec though TBH mate.
Bottom line is you would be a LOT better off buying a car already done, that 10K car I just specced there would only sell for 5K realistically, if that.