Hello everyone!
I'll start immediately with the premise that I'm quite a beginner at Networking and my english skill are not the best , I'm trying to read up on how to create my first home network.
Attached you will find the network diagram with all the devices used.



So as you can see there are 4 different colors that indicate:
- Red --> Apartment 1 (rented via Airbnb)
- Light blue --> Apartment 2 (also rented via Airbnb)
- Green --> Apartment 3 (where I live)
- Yellow --> Garden Area (Shared with all 3 apartments)

My idea was to create 3 different VLANs:

- VLAN 10 --> Guest (for Apartment 1 and 2)
- VLAN 20 --> Private (for Apartment 3)
- VLAN 30 --> IoT (for Thermostats and 3D Printer)

Would it be possible to split the Guest Network into 2? Let me explain better, what I would like is that the Guest network of apartment 1 cannot communicate with the Guest network of apartment 2 and vice versa. or do I have to create 2 separate VLANs? I wanted to avoid having too many Wireless IDs. For the garden part, however, the guest network must only have access to the internet and not to the devices connected to the guest network in the house. Would it be possible to create rules to do this?

As regards VLAN 20, however, I wanted to understand how to have a single Ethernet port to connect to in order to have access to everything connected to the network.
For the Network Printer, do I have to set some rules to ensure that the printer is available only to VlAN20 users? Would it also be possible for the printer to be available remotely?
As regards the NAS, however, I would like it to be available only for VLAN20 and in any case to be able to have remote access to use PLEX even outside the home.

For VLAN 30, however, the devices must have the possibility of being controlled remotely, do I need to set something or is everything already set by default?

I add that the 3 VLANs must be associated on all APs.
APs 6 and 7 of the "garden line" will be connected via Mesh to AP 5

If you also have other ideas or better solutions, I'd love to hear them!
Thanks to everyone who will have the desire and time to help me