Houston do not realistically have the assets to trade for Paul George. The earliest mildly valuable pick they can now send is 2020 first round pick, they have almost zero players to give away. Eric Gordon and Clint Capela are probably their most valuable players they could use and even then that doesn't exactly move the needle for Pacers, I bet, and they would be left without center if they use Capela.
Players like Ariza and Onuaku will not get you anything serious. Ryan Anderson with this contract has negative value. It's funny how virtually every single big contract given to a non-elite player last season turned out to be garbage. Whiteside for a max was a no brainer and players like Drummond and Durant were obvious and were still getting incredible deals without cap increase anyway, but out of Biyombo, Noah, Anderson, Crabbe, Turner, Bazemore, Fournier, Deng, Mozgov, Mahinmi and Teletovic - all signed at obscene money just because teams had cash available - not a single one has proven anything but a terrible, terrible disappointment.