Im not sure about Flagstaff specifically but I recommend checking out Sedona and the town of Jerome out near Cottonwood. I love passing through Flagstaff and would like to hear about more to do in the area also.
I found a guy on offer up selling generators a few years ago. He had a bunch of brand new ones in his back yard in a shed. I didnt ask where he got them from. I only paid $500 for mine brand new. He was in Ontario/LA area. I just checked and I don’t have his number anymore
I have no experience with either but I have a similarly setup. I would probably pick the one with the higher output but I would read everything I could find about the two of them before I bought. It’s sure great when the power is out and you’re running the necessities at home.
Here is the one...