I have available for sale two one-week stays at the Marriott Residence Inn Miami Beach Surfside for Yeshiva Week (1/19-1/26). The price is $1,200 for each room (with another $170.94 USD payable at the property for resort fees which include access to the Surfside Aquatic Center and more). The hotel is covered by an eruv and is walking distance to shuls and kosher restaurants.
This is for a standard room, and you will be added as a second guest (as is done with all Marriott certificate sales). These dates are sold out for points reservations, and the rack rate as of today including all taxes and fees would be almost $2,000.