Price due to distance is always the problem for me.
There are no concerts I even like a bit where I'm living (central Canada) so I have to wait for my annual two weeks in Europe. This year, there was nothing close enough, but usually I also try like you to do two concerts per year.
I just obtained Canadian citizenship though, so it's opening the possibility of going to concerts in the USA (closer for me than the Canadian coastal areas, where there are also a lot of things for me to see, but it's sooo far!)