I've done my own alignments for years, had the wife's car checked before and it passed... tape measure and calibrated eyeball gets you close enough for government work... I kinda gave up on getting my '90 aligned good, every time I get it all nice it migrates within 50 miles... I blame the bad angles from the stock radius arms (it's on the list...). No it's not perfect but I'm not doing 120mph or anything, nothing has had any goofy behavior and most things anymore are only adjustable on the toe... I drive 20k a year, my Geo Tracker had 55k on the 50k mile tires that are on it right now, been rotated once, perfectly even wear, '97 Ranger has about 35k on the $60 tires (used, I didn't balance them when I mounted them either, slight vibration at 60) I put on it that haven't been rotated and are wearing fine. If I had $1k tires I might care more...
My friend/coworker/boss has a '08 Jeep Rubicon I believe, 4" lift, all sorts of new parts thrown at it trying to get it to stop doing goofy bump steer stuff, been into the tire shop numerous times... I took one look at the steering geometry from the front and found the problem... the trac bar relocation bracket was put on upside down, made it more steep instead of less steep, axle was pushed over one way, steering link and trac bar crossed instead of being parallel... fixed...
Anymore finding anyone that knows anything older is a crapshoot...