Not intended as flame, but a $125 caster-camber gauge is a luxury rather than a minimum requirement. $20 or so will buy you enough common measurement tools to let you work to within less than 1/8°. $30 plus a dial indicator and some careful home-fab will let you work to somewhere down under ±0.05°, which is better resolution than the available steps in any alignment arrangement that uses commercially available shims.
Guess I should have mentioned the parallel strings and the 14.5° angle gauge (the $125 C-C gauge would likely use a 20° angle gauge instead). The strings are fussy to set up and are somewhat sensitive to the wind if you have to work outdoors, but they'll get you closer to the straight ahead and to reliably getting your sweep angles than you can do just by eye.
Norm
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08 GT Premium Black/Light Graphite, stick, un-FStock weenie-EP 626/V6/stick, Prepared just enough, sometimes
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