First of all.. the thing weighs too much because it looks like your the material you are using for the long slats/blinds are 2/6s? or 2x4x? Why on earth did you pick something so fat/heavy? you can use much much "thinner" material for a blond.
Are those like closet shelf hangers for a brace? that's awful.
Next.. you don't have to build a screen in place on the ground and then HOIST it up? you build it up as you go along?
With all the time and aggravation and money you have spent on lumber and materials.. you should just buy some 10 feet tall arborvitae and start lining them up like soldiers. Not high enough? then keep them in planters and not in the ground. If it takes 20 or 30 of them then so be it. you might not get 100% total blockage but you'll be surprised how much a bunch of them will block the annoying things you look at.
If you think ARBs are too expensive look for other tall/full shrubbery to use. Keep them in big potted plants so you can move them around.