It is ideal to give the internet to your customers and have a separate network for your office.
Ethernet 1 – internet socket by DHCP
Ethernet 2 and 3 is the output of the internet with the subnet 192.168.1.x (ideal for people in one network can not see the other, in case you use the same router for your office and your clients)
Ethernet 4 and 5 is the internet output with the subnet 192.168.2.x (ideal for people in one network can not see the other. In case you use the same router for your office and your customers)
It has bandwidth control in the full ip pool in both outputs 512k upload and 5mb download, can be modified on demand. (Wired and wireless)
You will also have a password-enabled signal and a secondary as a guest with a key using another subnet than the main one to split networks.
It has a VPN server and you can add all the users you want, it comes with 2 users configured to be used immediately.
Hardware recommendation: any Mikrotik that is 128MB RAM or higher and ideally 1000MHz or higher. (For 10 people)
If you are going to use it to provide internet or many simultaneous VPN I recommend, double core and 512mb or higher.