getting to Cornwall is easy, straight down the A303.. I suspect you actually mean studying full-time while balancing domestic commitments, which is rather harder.
I spent some years in civils but I found it ultimately unproductive, I suspect because I started in drilling and ultimately found my way back into the oil industry. I found with civils that you really need to spend your whole career in it, or people will simply not acept you, which is a shame because the oil industry pays soooooo much more.
The civils attitude seems to be that 'so-and-so will leave in 5 years, he is not one-of-us'; there is a general attitude that there are permanent staff, 'agency riff-raff' and nothing in between. If you have spent time overseas you are not really welcome.
In the petrochemical sector it is a case of 'so-and-so is available, can we use what he has to offer' and a whole spectrum of shades from permanent staff to occasional agency fill-in. Mining tends to be more towards the latter format.
I re-started my career by moving across into on-shore pipeline when civils collapsed in the early 90s and became involved in various professional development which I would never have got as a civils freelancer; I had turned down a couple of 'staff' jobs in the mid-80s, compounded the felony by pointing out that my wife earned at least as much as a teacher, and my card was marked for life.
I still do occasional civils work but not to any great extent, the incentive isn't really there. I like to keep my hand in to some extent but have given up on making any professional progress in that direction. The British civils industry has very largely lost the ability to compete in the wider world and so is a closed shop of a limited number of people who generally have few prospects outside UK by the time they are past their early 30s; I noticed this with the TML people who went on to the Jubilee Line in the 90s, CTRL in the 2000s and are now at CrossRail. It's like coal mining, a bit incestuous.
As knocker says, mining engineers to tend to do well in a range of other fields whereas civils graduates rarely stray far from civils. One of the young CSM graduates from the Combe Down project went to Schlumberger, a seriously major name in the oil service sector, while another went to a consultant working on Crossrail.
my calculus was ropy forty years ago and it hasn't inmproved since....
tamarmole illustrates my earlier point about being a manager with no specific qualifications as such. That said it certainly doesn't help.
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.