I have one, where to start.
Make sure it gets up to temp quickly, as in half way within a couple of minutes.
Otherwise it needs a thermostat, 50quid and half an hour to change.

Crap handbrakes, will need shoes and discs on rear to sort that, takes about two hours at a cost of around 100quid in parts.

Front brakes are known for warping, again not a big job, but 100quid minimum on parts.

Vague steering, this is a rubber coupling that goes soft, no idea on cost, dealer part only but would take about half an hour to change.

Rust on all arches, the lips hold dirt in badly.

Vanos rattle, pain in the arse I'm afraid, but diy isn't costly.

Exhaust should be quiet unless you give it some beans, if it stays quiet, then the exhaust valve has failed. Easy fix, hit valve with screwdriver through tailpipe and force to stay open. Better performance and sounds better anyhow.

Remotes can fail, batteries charge of an induction whilst in barrel, see someone to get battery replaced, about 20 quid a pop, that's if the controller under the dash hadn't failed.

Heaters can stop working, this is the resistor in the air stream, pain of a job, but costs about 50 at most for the part.

That sounds bad, not even covered cracked rear subframes yet.

However these are all wear and tear jobs really, cracking motor none the less. Mines great and such a dream to drive, I recommend remapping though, not much more power, but response is far superior.