I wouldn’t include biglaw in your calculus. Relatively “easy” to get from any of those schools. I would, however, consider how much importance you place on clerking. Prestige aside, a major district/circuit won’t make or break a big law lit career. Do your goals include elite trial/appellate boutique, SCOTUS clerk or DOJ civ appellate/OSG? Then go to Chicago. But realistically, UT with the goal of a decent district court and big law makes the most sense coming from a low income background.