Approximately £1,000 for two MOTs, parts (brake disks, bulbs, egr valve, battery, servicing and tyres).
<edit> you ask about reliability... I had a battery fail after leaving lights on and letting it go flat in sub zero conditions.
I don't do the mileage I used to, but I used to do 20k a year in cars with higher mileage. Most cars reach 180 - 200k before becoming unreliable or losing performance. I've done multiple 400-600 mile round trips without a hitch, at 58mpg over last 7,000 miles.
I have never been sentimental about a car. They are indeed tools for moving around in although some are more pleasant than others. Buying new is irrational. I buy cheap and drive them until they are no longer cost effective to maintain. I fell lucky getting an almost immaculate medium mileage car for 800 as it was p/x disposal when the bottom fell out of the s/h market with covid reducing demand and the mot amnesty reducing it further. Normally I would consider paying twice that for a car.