Yes, the Rhode Island DUI law allows the police to arrest you for DUI on private property (even while they cannot do the same in Massachusetts). But, if you are charged with DUI on private property you should seek the representation and guidance of an experienced Rhode Island DUI lawyer to explore and utilize any potential defenses that may be available to you.
No, you do not automatically lose your license for a DUI in Rhode Island. In Rhode Island, you will never automatically lose your license after being arrested and charged with DUI in RI. At a minimum, you will keep your drivers license until you appear in Court at your first court date.
The Rhode Island implied consent law means that when you are issued a drivers license you impliedly consent to taking a chemical test if arrested on suspicion of DUI.
As a motorist you are legally obligated to submit to a preliminary breath test when requested to do so by a law enforcement officer who has reasonable suspicion that you are driving under the influence in the State of Rhode Island. If you are requested to take a preliminary breath test and you refuse, you will be subject to an $85 fine but you will not face the likelihood of a license suspension based on this violation.