Hi, I'm buying my first car of my own (been driving for about 2 years) and hoping for some advice

I have a budget of £4000.

The car will be used this summer for commuting 30 miles each way over every road type (literally, country lanes to A-road to motorway to b-road)every day for 10 weeks this summer.

After this it will be taken to my uni and not used during the week.

During the summer and from then onwards it will be used for trips away. This will probably consist of 600ish mile round trips 3/4 weekends out of two months, 200ish mile round trips 3/4 weekends out of two months, and then only short journeys on the remaining weekends. It will also be used for driving down to the alps once (possibly twice a year). The trips away will be mostly group mountineering or kayaking trips, so will be 4/5 people, full kit (lightweight weekend bag - plus possibly tents, extra kit etc), and would quite often have 4 kayaks on the roof. It may also occasionally have to pull a trailer - although if this isn't possible it wouldn't be the end of the world

I'm looking for something reliable, reasonably cheap to run, and I think to meet size requirements would probably be an estate, but would consider large hatchbacks.

With this in mind I've been looking at cars, and am thinking along the lines of

1.7 CDTi Diesel Astra Estate (like this goo.gl/GUfpxj)

1.6 or 1.8 CDTi Diesel Focus Estate

Both of these cars with my budget are available from approximatly 2009 with 100,000 to 120,000 miles.

Is this a good idea, particulary as the mileage seems high - or does anyone have any better suggestions