Dear Brad - Oh, those mid-life crises!!! But that's exactly what inspired me to get off my duff, quit doing my boring transcription job, and get into the food biz! The old adage, 'do what you love' is so true, and everything else will fall into place!
Now - my personal preference - even tho you said you can't make a move right now - is for you and family to relocate to Charleston, SC, and you and I can open a little 'gourmet to go' place together!!!! Day hours, get involved with the local produce people and use local ingredients, pick and choose the catering end, and close up shop by 6 or 7 at night! Hmmmmmmm?!!!!
About writing a book - I do think you'd be fabulous at it, and you have so much to share - it'd be selfish of the rest of us here if we wanted to keep you all to ourselves! However, the down side of writing a food book is 1) there really is no money in it; the royalties are miniscule, even for the bestsellers; 2) there is such a dearth of food books on the market, you really have to have a 'gimmick' to catch the eye of an agent and/or publisher; 3) it costs a ton of $$ to put together recipes, because of the endless testing that needs to be done to be sure all recipes are accurate.
Everyone I've ever talked with who has done a cookbook, has just rolled their eyes and moaned! That having been said, I DO think you have an awful lot to share with the food world, and your perspective on history, food pairing, creativity -on and on! - would certainly make for great reading! Having helped hubbie edit his own published book (not on food, on the martial arts), and worked with a local chef in the beginning stages of his book (which was stymied by a jealous wife - a whole other story!), I would be honored to help you out, if you decide to pursue it.
I know that whatever you choose to do, you'll be great at it! And if you DO teach somewhere be sure to let me know, because I'd be on the doorstep waiting for admission!!!
All my best, Jackie