Suggestions - Apartment Complex 7 floors

I have a client with a 7 floor apartment complex (students) that wants to provide Internet access to all 7 floors.

The apartment is concrete / bar between floors.

Each floor is 60ft / 60t with 4 900sqft units. Users need to connect using their wifi cards on laptops /workstations. Aprox. 100 users

I’m wondering if I need an AP on each floor? Any recommended specification would be appreciated.

I have been mainly using 900Mhz NLOS MT and Ubiquiti SR9 for Bridges with great success for a few clients