Some of these are more likely than others. Minnesota and Arizona (at least State House) are far easier than Pennsylvania. Then you have Texas where local Dems are already working hard to push to envelope and walk Beto's path.
Yes, I don't quite understand the emphasis on Pennsylvania. They got nowhere in 2018 and between Wolf and the 5D/2R state supreme court they are completely safe from a gerrymander in PA.
IMO, better to spend the time and money reaching for the GA or FL lower house. Even if taking control isn't viable, giving the GOP majorities enough of a scare that they don't get too aggressive with redistricting is.