Hotels and alternatives
Abaynou has no ordinary places to lodge, the best option or better, only option is to sleep in Goulimime.
Restaurants and alternatives
You will have to settle with one of two-three simple cafés, where you should expect little beyond omelettes.
No banks, go back to Goulimime.
Getting back and forth to Goulimime is not a big problem, as there should be as much as 1 to 2 taxis covering the distance every hour between sunrise and sunset.