Its a good trade to have. You can travel the world with it. No matter where you go some fella wants a shit or a shower. I'm 4th generation plumber in my family. At it over 15 years. Just doing part time now. Joined the Fire Service and the plumbing defo helped me to get in. Look after your knees. I'm 29 and mine are fooked already. You'll make money if you stay well clear of dodgy builders and there plenty of them coont about. Good luck with it.