Northern Light
Superstar
The City should outright acquire the grounds, including the parking lots as park.
A condition could be that the funds be used to create an endowment to maintain the heritage building(s).
The City would likely have to deal with unmarked burials under the parking lot, and some associated risk of cholera exposure may be a risk factor.
But remediate that space into a well maintained, heritage-appropriate, mostly formal public park, but with a good quality playground for the childcare facility and/or the park space in general.
Side Note: To my understanding, similar unmarked burials and associated cholera risk is the reason for the all-paved over school yard at St. Pauls; and the reason the school hasn't been rebuilt either.
Couldn't quickly dig up the story for the Metropolitan United grounds, but here's one for St. Paul's: