@AndzejJ I need some advice. I struggle a lot with performance (speed and quantity of data). I like to share my current setup of my RUTX50 router. At this stage I have just 1 sim card but I am planning a second to improve the performance.
This is how I have setup my network. Its both used for business and pleasure:
Load balancing allows you to use multiple WAN interfaces to help to handle various requests that come from different clients. Because the device has only one modem, you can not utilize the two sim cards simultaneously, so adding a second sim card won’t allow you to utilize this feature. If you wanted to utilize this feature, I would advise you to get another WAN service such as a Wired WAN or the Wireless WAN. More information can be found here RUTX50 Failover - Teltonika Networks Wiki (teltonika-networks.com)
If you do add the second sim card it will allow you to utilize the Failover feature that ensures constant internet to your clients so that when the Sim1 goes down the second one will be activated and continue to provide internet. Unfortunately, the Failover feature would not have any effect on the total throughput of the device. More information on how to setup can be found here RUTX50 Failover - Teltonika Networks Wiki (teltonika-networks.com)
Regarding DHCP, it is usually best practice to put static IP addresses on your routers, access points, and switches. For clients to use DHCP.
Multi AP wouldn’t be applicable in your setup since you do not have multiple Wi-Fi WAN sources available. The Hotspot feature will provide authentication, authorization, and accounting for the network considering the number of clients that connect to the network. It most importantly gives an option to limit download and upload speeds. More information about how to set up and the different configurations can be found here RUTX50 Hotspot - Teltonika Networks Wiki (teltonika-networks.com)
Lastly, if additional WAN sources wouldn’t be available, you could try offering traffic shaping (SQM + QoS), which could help in controlling the existing traffic: RUTX50 Traffic Shaping - Teltonika Networks Wiki