Yeah, you should spend no more than about $70 to build your racks.
I built two 20 ball racks, both as solid as can be, using a bunch of 2 x 4's and a 2 x 8's, along with 7"x 4"x.75" dividers.
it's not hard to do at all.
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Duct tape is like 'The Force'. It has a light side and a dark side, but it still holds the universe together.
Some days you're the bug some days you're the windshield.