Solar setup on an island

Hi there.

I am in the process of setting up a solar system to replace a generator setup I currently have at my camp ground. Firstly, allow me to explain that I am based on an island in Cambodia so my solar yield will be different to yours in the states. My objective is to replace a 220v genny setup which is currently running:
1 x 2.8kw genny @ 220v
2 x 10amp battery chargers
1 x 30amp battery charger
1 x 800watt water pump (occasionally)
Lots of lights;
16 x 40w incandescent bulbs along 140m of 1.5mm multi-core cable (northern track)
18 x 40w incandescent bulbs along 180m of 1.5mm multi-core cable (southern track)
6 x 40w incandescent bulbs along 70m of 1.5mm multi-core cable (kitchen)
~15 x 40w incandescent bulbs on several short lengths of 1.5mm multi-core cable (base camp)

If this is hard to visualize, I've drawn a rough diagram that you can find here. You'll need Google Earth.

Currently everything is 220v, however I'd like to move my lighting to a 12v DC setup. Now in this part of the world I don't have access to electronics shops and such so I make most of my stuff myself. Don't recommend fancy equipment because I simply can't get it here. I'm not going to be able to afford to run the pump off solar and I'll keep the genny and chargers as a backup for those times that the solar system can't keep up with the load.

The way I see it, I have two options.

1) Replace all of my light bulbs with power saving models (8-11watt), buy a decent sized inverter and maintain my 220v circuit.
2) Replace all of my light bulbs with 12v alternatives, although I don't think this method is going to work because of the distance and cable size.

The reason I went with the incandescent bulbs is because I wanted the old-school orange glow. They're all hanging from trees and sway in the wind which gives off some awesome shadows around the camp. If I change to LED bulbs I'll lose this feel which I'd rather not do. I hate white lights, although I can get the small fluro bulbs in 'warm orange' which should do the trick.
I currently have 3 panels at my disposal; 100w, 50w and 20w. I've got several 80-150ah lead acid batteries that I just going to have to do as I can't get nor afford solar gel batteries at this time. I also have 2 10amp solar charge controllers. Getting more will be tricky.
Lastly, I only need to operate camp lighting for around 4 hours a day. If I need more than that I'll simply start the generator and pump juice into the setup using the bigger charger. If this becomes a regular occurrence I'll simply get more panels and a bigger battery bank.

My question is; how should I best tackle this project? What will be the cheaper and more efficient solution? I'm leaning towards an inverter for the lighting but if I do this, do you have any tips?

Oh yes and as and added caveat; the salt content in Cambodian waters is way higher than average. This ends up in the coastal air and things like cables turn to dust in 12 months or less if exposed to the air. My setup is far from sealed and some of my cables have begun to corrode. I'll do my best to fix them but I'm guessing this will affect my system's performance.