Most people in every group think he's a knobhead though. You aren't likely to find a majority of any group. I would tend to see the same types as you (minus the dishonest bit), btw, but tradesmen are w/c.
As far as specific policies, the devil is really in the details in a lot of cases. I'm seeing a lot of people now looking very carefully at European models of healthcare for example,
But again, I think you need to look at Farage as a kind of protest movement or vote.
They are fed up with the Tories because they aren't very inspiring, have had some major screw ups, and probably most importantly, have simply been in government too long. Also - they have done nothing useful with immigration, mainly due to economic constraints. They clearly need some kind of party renewal.
They won't vote for Labour, they have no good economic policies that differentiate them from the Tories anyway and their social policies are batshit. They also will not get a handle on immigration and moralize it in a disturbing way. But most importantly, they are clearly the party of the professional elite, govern in their interests, and despise everyone else. No one will vote for someone they feel despises them.
The Lib Dems and the Greens basically have the same issues as Labour.
Farage taps into this gap, the discontent, very effectively, and the important thing is, NO ONE else is offering anything on the same issues. So at worst, a vote for him is a big Screw You to the others, and there is always the hope if he elects any MPs it could throw some new element into political discourse.