I am a 24 hour plumber and the money is definateley worth it, I am at the top of google naturally and it works great tbh, yeah sometimes your too tired so I just turn my phone off , but you can charge nearly double , I would say if you are going down the 24 hour route then just stick to repairs and small installs but on a day when you get say 5 jobs it does put a smile on your face, you need to advertise correctly , and is dependant on the area you live , some days i'll get 20 clicks costing an arm and a leg and people just phoning to get quotes and trying to sell me stuff . PM me if you want to chat as I don't want to let all my secrets out of the bag on main forum, 24 hour route can be costly if you advertise in the wrong places and nearly bust me in my first year.