SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

Yep

Like I said 2 acres is huge. You would be putting around 3000-5000 gallons of water PER cycle to properly irrigate 2 full acres. A Full month of water( say 15 days) in July is 75,000 gallons . Add this up with your water rates..

Maybe focus around the main sections of the house/ driveway entrance

1" Meter at 60psi can handle quite a bit more flow then your house hose bib..
As boots said, install a back flow preventor ( I prefer at the meter) Or at the point of connection to the house from the service line. Then get your flow rate

You need to take in account for pressure loss, remember you have pressure loss from friction in the pipe . This is accounted for in every 100' of pipe. This is why you should bump to 1 1/4 main for less pressure loss. As well as pressure loss from all the fittings. As well as your dynamic pressure to your static.
Make sure you have head to head coverage too

Yes, they charge money for water. For the long term, you get a well for the sprinklers. It will eventually pay for itself.