A quick look at the standing bid list shows a dozen or so wanting to transfer to IAH and 30 or so wanting DFW. Reserve staffing in DFW is much better than IAH. Staffing in IAH is at 24 and DFW 80+. Since upgrades happen at 1000 hours, many of those pilots will probably upgrade later this year creating openings. A number will probably move on to other airlines as well. Wild guess is a couple month wait after IOE to get based where you want. Currently ORD and SLC seemed understaffed with no reserve lines next month according to the PBS Bid Info page (DFW had 20 reserve lines and IAH 2).

If considering Mesa, you really need to look beyond the pay rates. Work rules are where the money is at.