I was able to buy the front 2 hatches, the back 2 hatches with liners, the little hatch up front, and a bunch of wiring/switches/random boat items from a guy on craigslist for $100. The middle hatch in the back is an old aluminum gas tank. I was going to make that into a livewell, and then I snagged the 2 hatches for the back off of craigslist so I converted one of those instead. The other plastic liner in the back has a drain and could easily be turned into another livewell if I ever decide I want to. The middle hatch and container in the back of the boat comes out so I can refuel and pull out my batteries etc.
The current battery setup consists of a small battery in the back which starts the motor and runs the fishfinder, and a large battery in the front compartment for everything else. There's room for another battery up front if I ever end up with an electric trolling motor. Everything is run through switches on the dash and then through fuse boxes in the front battery compartment.
Currently I have a bilge pump (automatic), livewell pump, livewell aerator, horn, exterior legal lights, two led lights up front, 1 led light in the back, an led map light by the keyswitch, and a fishfinder. I might run a stereo setup before spring, or I might not.