What size fuse? I can do $80 shipped for 30 ft of 0 awg (knukonceptz), fuse holder, fuse and 8 0 awg ring terminals!
You'll only need about 15-17 ft for the amp (depending on if your explorer is 2 door or 4 door and depending on where you place your amp), 3 ft (MAX) for the ground, and 6 ft tops for the the big 3. 30 ft will be more than enough for you (unless you just want the extra laying around). If you want more, I have more. LMK.
V.