First of all you're jumping the gun. GET A LAWYER. If the facts are correct you have only been arrested. Also, on private property? There has to be more to it than that. You had to have run into something or destroyed something. I state policeman can't even come onto private property without some other extenuating circumstance. Also, DUI can't be imposed on private property, it's only for public streets.
It's like saying the police came into my house and arrested me for public intoxication. Can't be done.
The general penalties in most states [ to answer your question anyway ] :
1. fines from a couple hundred to a thousand
2. dui school
3. some sort of attendance to a victim's impact group
4. county jail time from days to a month or instead community service
5. in cases of excessive BAC levels [like yours], a alcohol abuse assessment, and resulting in alcohol counseling
6. suspension of drivers license for up to 90 days
7. possible installation of the ignition device for 6 months
If you're leaving out some key fact like ... you ran into a woman and a baby carriage,.. it could be raised to a felony charge and you could go to state prison. [ i suspect you're leaving something out, just a nagging suspicion i have ]
Your state may play around with the numbers, but I've looked at several and they all have that general format.