It sounds to me like you shouldnt have any problems enlisting.
However, keep in mind that at age 27, when you enter Basic Training,
you will automatically earn the nickname "Pops" or "Grandpa". Most
will be much younger than you, but you will have the advantage
of maturity. I hope you like the idea of a lot of sand in your future
and many months/years of overseas deployment. It will not be to
"dream assignments" like Hawaii or Japan.
http://www.youtube.com/watch?v=E2Dab4agZDQ