The tree is about 15 years old that I know of. It's probably a bit older than that actually. And we are on about 2 acres right now, so there is plenty of room if we decide to put in a new tree; we won't have to remove the old one.
I'll try pruning the tree this year once there is a bit less snow on the ground and see what happens, probably give it some fertilizer. I found this handy short article on apple trees from the Ohio State University.
http://ohioline.osu.edu/hyg-fa...
According to it I need to picture a well pruned tree, and then start working toward that goal over the course of a few years; removing any unnecessary large limbs two or three at a time each year.
This will be an interesting experience for sure. Thanks for all of the help everyone.
