To fix or not to fix ....

Seems to be the story of BMW owners, getting hit every 25000km with expensive repairs

I don't blame BMW as my car is 2000 BMW 323i and it's just showing its ages, but the expensive labour & parts still get me every time. Especially the charge-per-diagnostic fee!!!! They should be allowed to only charge it ONCE, and not per issue/section

• No heat because Thermostat/leaking coolant - $415+tax
• Noise when turning because front lower control arm bushings separated - $766+tax
• Drive belt has bad crack - $199+tax
• Intake Boot torn - $134+tax
• Total of all repairs = $1710.82!!!!

That's on top of the charges I already paid up front (labour $287.50 + parts $73.10 = $407.48)

• Oil change & maintenance - $220
• Diagnostics for heating - $120 (this is 1/4 of the thermostat repair already, gee)
• Diagnostics for driving noise - $60

Anyone know a good BMW mechanic? or recommendation to fix or not fix?
I am seriously considering getting a new car, let it be used or leased, anything's better