Mikrotik

Mikrotik manufacture cost effective network devices.
Some pros:

• cheap
• affordable
• very configurable
• frequent (and free) updates

Some cons:

• very configurable
• frequent updates

Configuration is sometime hard and complex due to the fact everything is configurable!
Some resources here:

Configuring centrally managed WIFI
Configuring OpenVPN with 2FA
Telegram notification on openvpn access