In reply to Stanners: I'm not a a PRE teacher but do teach.
Teaching can be great as a job, a lot of outside of school work involved - not just 9-3, can be 9-7 on some days if you are involved in extra curricular clubs, etc. and of course there is the marking involved.
PE teachers often see a different side to the school as often (but not always) the non academic, trouble causing kids in the classroom come to their own in PE. However, there are then the kids who don't want to do PE and rarely have kit as well as those who do bring kit but put minimal effort in.
Your comment about evenings/weekends/holidays however seems as if you want to do it in a non-school environment?
Ben