Your situation reminds me in many ways of mine, although under different circumstances. When I was diagnosed, with an AN that my initial report said was 2.4 cm (which afterwards I realized was underestimated), I was 37, I had a 4 year old and a 1 year old. Just back from maternity leave to a very demanding job, no help from extended family, husband very busy at work too. Living in a medium-size town, which does have a hospital, but no surgeon specializing in ANs (which is of course important) meant that I would have to travel out of town, at least 3 hours for the closest centre for consultations and for surgery. I must also say that I was asymptomatic (my AN was found because of mild facial numbness). At that point in time I thought that it was impossible to have surgery, so I decided to have GK.
I did have GK about 6 months afterwards (by that time the MRI showed that the AN was about 2.8-2.9 cm). The treatment was uneventful, I had basically no side effects, took a week off work (could have taken less). As you will see in my signature the treatment eventually failed, and I did need surgery after 3 years. But it did slow down the growth, and bought me time. After 3 years I was in a better position at work, my mother in law had retired and was able to stay with us to help etc.
I probably took a risky decision to have GK for an AN of this size, and I should have done it earlier, when the AN was a bit smaller. Looking back though, I still think that although it was not the best option for my AN, it was the only thing that I could do back then, due to my personal circumstances, and certainly better than no treatment at all. If you are considering radiation, I would suggest you consult a good specialist sooner rather than later and get their opinion about the feasibility of radiation in your specific case, risks to the brain stem etc - every AN is different depending on the location etc. As you probably already know most centres will refuse to treat an AN with radiation when it reaches the 3 cm limit, so may loose this option if you wait too long.
I don't think that having CK or GK will necessarily end your driving carrier, of course everybody responds differently, but most people do quite well and can go back to their jobs after a while. Perhaps taking some sick leave from work for a couple of weeks would be feasible.
A last point is that above else, your health comes first. If the AN grows too much, it may cause all sorts of problems, risk of hydrocephalus etc. Before I eventually had surgery I was told that I was close to developing hydrocephalus and should do something urgently - reaching this sense of urgency is no fun at all.
Anyway, some food for thought, I would be happy to give you more information if you would like to PM me.
Marianna