Military to B School: Want to work in Europe

I'm 28 with a military background. I recently took the GMAT and got the score I wanted. My goal is to career switch into finance and work in London post-MBA. Toward that end, my #1 choice is LBS. The gap between that and my next choices is very large. My plan is to apply only to LBS this year and go if I get in. If not, I don't mind staying in the military for another year or two, and apply to LBS again with other backup schools due to what my age will be at that time (matriculating at 30). I am slightly worried that this plan puts too much emphasis on one school and that my age could be an issue next time I apply. Does this plan make sense given my situation? Thank you for any input you have