Hmm, I would expect the quote to be around $800.
It should take a workshop around 3 hours to change a clutch (if I had a workshop it would only take 1 hour). So that'll be 3 hours x $120 (I think that's what they charge these days), so $360 for labour. An excedy HD clutch kit at trade would be around $300-$350 and $70 to have the flywheel machine. Add $20 for oil, which should total around $750-$800.
Anyway, PM me your number, if I'm close by Weston I'll ring you and take a look.
And most of my work is done on dirt. I use a few bricks and wooden planks, ramps, etc. All but one of my engine swaps were completed on dirt.