Looks pretty good for a budget hemi, is that a nite lite with draught excluder round the outside?
Try ProjectDalek. We have a lot of builders on all sorts of budgets.
What one person did to make his hemis was to use old vinyl LPs and a home brew vaccuform.
People have used lengths of plumbing pipes for the hemi surrounds.
As far as finish goes, the 'bondo' filer that sells here for $12 for a small tin in the auto stores sells for $18 for a gallon trade. Having a rough finish underneath is no problem, its more to key off.