Thats actually a pretty good project list. I would suggest a main fuse block from Autozone ($10, 150w max, 6-30w circuits) and a Pep Boys fuse block ($5, 30w max, 4 circuits available). You can tie in several of these to the main fuse block as needed. Also, I had 4-100W bulbs in my Hella 500s when I still had my 1st gen X. (actually, they're still somewhere in my garage...) I have an old Thread with tons of pictures from other guys also there on how to ruo the wires up to the roof.. These 100w bukbs are much brighter than the 55w bulbs BUT they pulled @ 7w each so I had to run a hot and ground (8 or 10awg) wire to a relay. The relay MUST BE oversized for what you need.
You need to break up the project into 3 sections which can be done on differet days. First thing to do is determine where you want the lights. If on the roof, you need to drill the hole for the wires to come up, add a grommet and silicone to seal it up. If lights are on the front bumper, skip that step. First, you can mount the lights at this point. Thats a project of its own. Second, you need to mount the relay somewhere accessible, high & dry. Run a small 16 or 18awg wire from the battery to your switch inside the cab, then back out to the relay coil. Use lots of black zip ties and black split wire loom to keep things clean and hidden. Ground the switch to something bare metal nearby, then ground the other side of the relay coil. This finishes the control circuit.
Third, run your main power wire from the battery to the relay, then from the relay to all four light (use weathertight connectors here). Ground each light and hide the wires. This finisher the power circuit. Test and align lights.
Remember that in California you can get a ticket for NOT having light covers on any light mounted above your headlights. Hope this helps...