Need advice on building a network for a co-working space

Need advice building a network on a co-working space

Hi I'm a starting a new venture on a co-working hub mainly for small start-ups, freelancers/hobbyist and space for business meetings etc. I'm basically a newbie technical networking stuff and starting to get into setting up a network for the hub, with devices mostly be wireless (laptops, smartphones), basically just have one wall outlet for LAN in the admin office. The internet speed currently is only at 20mbps dl/up, but might bump it up to 200mbps dl/up when the hub would get attention in the future. I want the hardware side to be able handle if there's 80+ users at full capacity. The space is around 4750 sq. ft, no ceiling, concrete walls but all the rooms (thinking turf, conference rooms, private pods are glass sliding doors). Mostly open space not much walls.

My plan/requirements -Ubiquiti AC AP LR or PRO not sure what suits my needs better?

• Router, just for the APs ,that can do firewall to keep members a bit of security to separate each members on a separate network as the others for security (VLAN each members?)

• Captive portal that can generate a username and password when logging in the internet.

• One user can't take all the bandwidth that would cause slow downs on the network (without limiting bandwidth speeds)

• There's one utility printer connected through wifi to the network for member's use (can be visible on the network who ever is in)

• Can handle 20-80+users max (assuming 2 devices per user that be less than 200 devices)

• Able to configure network connections to enforce session time limits

My initial plan was just running 2 access points in the space connected to a switch, i guess that's not a good idea security wise. Any recommendations what set-ups and hardware i need?

Floor plan: Red= router placement Blue= planned APs placement

(https://i.imgur.com/TzsirHT.png)