Generac is bid spec quality equipment.
With all due respect to the other posters that are so fond of generac, there are much better brands out there. You will pay a premium for the better brands though.
I'm sure you can find a really old but very low hour used unit for your application. Old standbys are replaced all the time, and they have usually hardly been used. In an agricultural setting where you plan on actually running the unit a considerable amount that is what I would go with. Parts sourcing may also be something you want to keep in mind. You can find generators with many different engines in them isuzu, john deere, volvo, cat, cummins etc. etc. etc. If you plan on actually putting some real hours on the equipment, and down time is an issue.... parts sourcing for the engine would be an important issue. Isuzu's rarely break down, but when they do sometimes the parts can be a week or 2 out, depending on what you need. Cat seems to always have parts in stock, but their parts are pricey IMO. Cummins has cheaper parts than either in my experience, but part is not always on the shelf. John Deeres break down more often than the others in my experience, but parts are cheap and easy to find.
Someone else mentioned MQ (multiquip) earlier. They are in my opinion the best generator around. Some are made in japan, some are made in the US. I have only ever seen them in diesel models.
