experience you need (okay, i exagerate to make a point - figure a few
thou, minimally). but then again you don't distinguish between sound
design (which most docs don't have much of) and sound cleaning/repair,
which most docs need a lot of because their original sound sucks.
budget for color correcting - $150-300/hr (don't know what city
btw, good luck finding investors for a first doc. if you find any,
please report back. i'd be very curious.
as for other post costs, there are a number of good books on
budgeting. try googling or check on amazon.com for the michael weise