For about $50 and/or less, I have completed or am going to K.O. in next few weeks.....
1) Removed my AM/FM antenna whip and will be installing "hidden antennas," when they come in. Cleaner look and I don't really listen to AM or FM, but will need them for my scanner.
2) Front Tow Hitch - found a hitch for $50 and will be installing it, hopefully, in the near future.
3) Mounted my CB antenna on the front right stake hole (about $40 invested in parts for my previous truck & $80 for the handheld router, that was not needed).
4) Tow hitch brake light - modified it to only light up when the brakes are applied. $20 for the light assy & couple of hours of research to cut the correct wire.
5) Bed lighting (#7) - Spent about $30 so far, including S/H, and looking to spend another $5 for j-box connector today/tomorrow. Should have all parts by next weekend.
6) Magnetic Phone holder (#5) - completed this one before Thanksgiving, $20.
Other mods for less than $50-ish that I'm looking at doing....
1) Window tint across top 4-5" of windshield, down even with the lane departure camera housing. Should cost less than $30.
2) #1 front/back
3) #3
4) #10&11
5) MAYBE #15