[arethuza]

Another alternative is to look at one of the well paid but not very glamorous options such as Salesforce development - they have their own language (APEX), data query language (SOQL) and piles of other proprietary stuff that most developers won't touch with a barge pole.

However, if you are competent and can stand the poor development tools (I couldn't) then I suspect you could do pretty well....

Same goes for a lot of big-ticket commercial applications - mainly CRM and ERP, they exist in their own wee worlds of complex requirements, poor tools and high daily rates!