You asked for advice, so here is mine. I am another person with a young family, a single income, and GAS. Take TUMS. Sell the 11x14 after you get it-Though I might sit on it a little while since all these drooling hounds at your door know how much you paid for it- Get a 5x7, or 8x10. The advantages of 5x7-You will not have to get a new tripod, Holders are dirt freaking cheap-I landed 10 for a song when I started, Film is reasonable, and the contact prints are pretty. Not too small. I moved up to an 8x10 recently and do not love 8x10. The shape does not fit the way I see. Now 4x10 is cool. Can't wait to print my first ones. At the time I moved to 8x10 I was weighing a large camera. WOuld I trade everything I have in a minute for a 7x17 yep! but only if it came with holders and a lens. Those bastards are pricey-no offense Sandy. Right now you bought the means to set yourself up pretty nice in either 5x7, or 8x10.
I was told a while back by a very smart man. There is time, be greatful for what you have now, and plan ahead. If you want to get a larger format, wait. the time will come. You know, my dad just keeps getting smarter and smarter as I get older.
On a plus. Your wife will be much happier when you tell her you made money off the 11x14, than when you tell her you are dumping a couple grand more on film holders, one lens, tripod, and film.