first off you say you have day in anton, if that's anton city then that's a total waste of a day. nothing there really. hot, two stores, a building supply house , police station, and a gas station..
nothing for a tourist or a expat to even want to see. I past through there and that's it.
in el valle you can google don pepe hotel, or el valle hotel.. both clean and cheap.
write and ask what you want to know and I will help you anyway I can..