Personally, I haven't the same level of experience in the IT realm as you. I started and finished my IT education almost half a decade after high school. I might have another half decade in the field.

I just moved cities to raise a family and starting over is hard despite my experience. I have questioned my position in this industry, like you. My answer was to sign up for some college courses in the evenings. I will be taking web design which is something that has always interested me as a hobby.

As for starting into a new field as a job, I am unlikely to do so. Bills and responsibility of parenting is too much to allow me to tank my income. Instead I plan to make my new learning experience into a side job and perhaps eventually a full time business.

I suggest finding a hobby that can earn you money on the side. Keep your salary and explore new avenues without rocking the boat. If it becomes interesting enough or profitable, then you can choose to follow an alternate path.

And thats Mr. Play-It-Safe's guide to mid-life career crisis management! ;)