Well if there is one thing I am ALL about, it's DA BUDGET MODS.
Here's a few:
Tie downs made out of Angle Iron, bolted to the bed, and under the side rails.
Homemade spare tire mount:
Auxiliary input into old AC Delco (so bluetooth will work on it)
And the Aux Input mounted behind the ashtray door.
Rubber Gym Flooring for matts
And cheap ABS Plastic repair (plastic shavings + acetone)