From the actual November 20th Letter of Intent:
The 'owner' of the Harbor Garage is the Rams Head Development Company, LLC, a NJ LLC. This is probably a REIT fund within the portfolio of PGIM Real Estate; PGIM is an arm of the Prudential Co.
IMO, Chiofaro's actual ownership stake in the garage property is limited, and perhaps minuscule.
PGIM has the $$$ to finance the actual development, whether they would do so is another matter. For example, they could sell a permitted project a la GE, or force Chiofaro to find another party to finance the construction in return for an ownership stake.
The Letter of Intent indicates that Chiofaro has not yet decided what the mixed use components of the development will be, nor the proportionate share of these components. IMO, that makes it unlikely this will be built on spec; i.e., the office component will be pre-leased, and any hotel component will have a hotel brand signed up before shovels hit dirt.