I can't comment on how your farming will work. Put a pencil to it, and if it looks good, and you want to do it, then go for it.
I will say, a pivot on 35 acres might be hard to justify, depending on what you grow under it. The initial purchase of a pivot is sometimes the cheap part. From there you have operating costs, pumping water isn't cheap, plus the motors to move the pivot. On top of that, don't forget the maintenance. Every tower has 2 tires and gear boxes, switches, plus all the drops, nozzles and everything else. Also, you have the pump, pipeline, wiring, motor starters, etc... if it's electric, otherwise you'll have a stationary engine, hydraulic drives, lines, etc... In addition it is basically a piece of machinery, and only has a finite life. Depending on water type, maybe 25 years + or -. Just figure all that, then see if it's worth it. I have several of them, and they can be worth it. Just do your research first.