Well, there are a couple of other things that you might need to consider.
You've mentioned flying at night. I don't know about Wellesbourne but Brimpton is a grass strip with no lights (and no fuel). Unless you can land in daylight and depart in daylight, you won't be able to do any night flying in and out of Brimpton.
And you need a bit more than an airplane with de-icing to fly in bad weather (night not really being relevant to icing). You'd need a full IMC or IR panel and the training and skills to fly safely in bad weather. And, again, since Brimpton is a grass strip with no real facilities, you won't be able to get in and out in anything other than VFR conditions.
I hate to sound like a dark cloud, but I'd hate to see you make any real plans on this being practical only to be disappointed. And when you factor in driving to and from the airport, pre-flighting, fueling, and the flight itself, half the time it's actually just as long as driving, just a whole lot more fun.
I'd say commuting by light aircraft is something you can do once in a while for the sheer kick of it and because you want to fly. Most often, though, it's not a realistic alternative to driving.
As an example, consider flying commercially from LHR to Paris versus taking Eurostar. Sure, the flight itself is only about an hour and the train ride is 3. But once you factor in the time to get to Heathrow versus Waterloo, the extra time for security, and the typical delays at Heathrow, plus the time it takes to get from CDG into Paris, your door-to-door time is just about equal to taking the train (and the hassle is a small fraction of that of flying).
Pitts2112