Estimate for painting a rag airplane.

Hi,

I've been offered a Champ which has been recovered. I'm not sure of the
system, but it's the one where the rags are a red color. The fuselage and
tail has been done to clear and the wings are white. I'll have to get it
done by an A&P due to time/geographical constraints, so my question is, how
much might I expect to pay to have the airplane painted and assmbled on the
average, including paint cost?
The interior, instruments etc have all been installed, so it,s just paint
and airframe assembly as well as engine installation and all the usual
tidying up.

Anyone?