How to create an input table pivoting field from multiple tables

Hello this is the situation:

I have multiple tables based on Type of school:

Primary school TableSecondary school Table

Then I have a table with the Max People Capacity regardless the Type of school

Daily capacity Table

And at the end I have a Calendar Table

Calendar Table

And the tables have these relationships:

Relationships

Moreover I have 2 Measures:

Total no. of People

Tot. no of People = 
SUM(Primaryschool_Table[No. of People]) 
+ SUM(Secondaryschool_Table[No. of People])

and the Availabilty Measure (Max daily Capacity-Tot. no of People)

Availability Measure = 
SUM(DailyCapacity_Table[Daily Max people capacity])
-SUM(Primaryschool_Table[No. of People])
-SUM(Secondaryschool_Table[No. of People])

I need to create an input table with "Date", "City" and the associate "Availability" as follow:

I need it as an input table in the data model, in order to create additional Measures based on it (e.g. Sum all city with Availabilty > 40).

Perhaps I was verbose, but it was necessary to make the picture clear. I thank you all of us who can help me!!! I'm trying to solve this since 2 weeks!