Seconding what the above poster said. A good tiler will find plenty of work anywhere in the state. And while some may travel to other parts of New England like another poster suggested, it almost certainly won't be necessary to stay busy.

If you want (slightly) more affordable areas than greater Boston, the 5 colleges region around Amherst/North Hampton and southern Berkshire County both have plenty of upper income residents who will pay well for quality work.