Forget retirement. You now are inflicted with BGEism, a widely known condition that causes massive weight loss of your bank account, while creating significant weight gain on your credit cards.
The initial purchase of the BGE is the least expensive aspect of owning a BGE.
You have been warned. 
Get a membership to Costco for your protein purchases, aluminum foil aluminum pans, and alcohol, get a membership at Restaurant Depot for tools such as sausage makers, knives, cutting boards, slicers, etc., find a great carpenter for building storage cabinets for spices and rubs,  dedicate storage space in your garage for a minimum 30 bags of lump, and cases of smoking wood, (cars, bicycles, yard tools do not need inside storage space, you will learn) build that second garage, (because your wife's car needs storage space, you will learn) keep a land scaping company on retainer, because you will buy another BGE and you will need to modify your patio and yard, adding lighting for the evening cooks etc., go to your appliance store and get a deep freezer, then go back 3 months later and get the bigger one you talked yourself out of,  then a year later get the big one (your third) you thought would be ridiculous to buy in the first place, build yourself a decent wine cellar, second fridge, audio and visual system for the time you spend with the BGE, new patio furniture, find a Lodge cast iron outlet, oh, yeah, almost forgot, start the planning of the remodeling of your kitchen. Do I even need to talk about coolers yet?
But most of all enjoy every step of this crazy journey, because it is worth it.
Welcome to the forum......therapy is every Friday night in here, and occasionally every day that ends in "Y".
Have fun, and glad to have you.