You mention £100 per hour, and I bet some are thinking wow whats the scope for undercutting that {Not me, I've got too many ethics on this point} but that really is what me and Matt are saying, where does this all stop?
Why do we do this to ourselves? Plumbers & Electricians don't.
Competition is healthy generally, but not if pricing becomes so reduced it drastically effects the earning potential within the trade.
John,
The thing is, alhough I can earn at a pro-rata rate of £100-£150+ an hour doing shop fronts, an outsider coming in would not be able to undercut me, and the others that are in town also doing shop fronts would struggle to do so too, just as I would struggle to undercut them.
The prices have found their own level due to intense competition.
If some one were to come into town and undercut me on one of my shops, they would have to undercut me by a significant margin, so a £5.00 front would have to be cut to a £2.50 front, and at that price, especially as they would not have any work in the town it would be a total waste of time.
Some years back, one of the other guys who cleans quite afew of the shops, and in fact used to work for me and even knew a great many of my accounts and how much I charged for them attempted to undercut me on every single shop I had in the town...how many do you think he managed to take off me??
Not a single one is how many

Shops like a very regular service, once they get a good un' they won't let him go.
Glen is like myself, totally agree with his post, Matt also has a good point to make too, on my commercial side, in particular where shops are concerned my trade has dipped hugely, not that I've lost any work due to being undercut, its a case of shops closing down, retiring or coming to end of lease and not taking up a new one. And no one is moving into these empty shops, it is quite alarming to see the rate at which town centres are closing down...they are dying on their collective arses. greedy landlords jacking up the rents, councils wanting massive business rates and the end result is the increasingly rapid death of the traditional town centre.
Crazy really, town and borough councils should be doing all they can to breath life into their town centres, but the astronomic cost of having a shop in today's town centres, coupled with highly restrictive and expensive car parking is driving businesses into the giant, out of town shopping malls.
And oops! I'm the one now guilty of rambling on at a tangent!

Ian