I just ordered two "table cloths" 60x126, ~90ft of Amsteel, and ~10ft of Glowire for around $50. A co-worker gave me over 100ft of muletape, so that'll be my tree huggers.
That's not bad at all for two hammocks! I know it's not the most accepted setup, but I plan on using cat-cut & duct tape reinforced plastic drop cloths for tarps ($3 Lowes each). My family only camps a few times each year, so I don't see the need (at this point) for super fancy tarps. Plus, New Mexico is dry to the bone right now.