Balancing Peplink WAN links for a small Vermont office using Claude workflows?

I run a small design studio in Burlington, VT, and we’ve been experimenting with Claude’s Whiteboards and Sheets features for client-facing project planning. Our current setup is a Balance 20X with a cable connection and a cellular failover SIM, which worked fine for routine office traffic. Now that we’re pushing more collaborative work through browser-based tools, I’m noticing the failover isn’t as smooth as I’d like when the primary link drops mid-session. I’m trying to decide whether to add a second cellular link for better redundancy or just upgrade the primary circuit. The concern is cost versus actual benefit for a five-person shop, and whether load balancing would help or complicate things with cloud services that may not handle multiple IPs well. I haven’t found a clear answer on how these tools behave across WAN switches. Has anyone here run a similar small-office setup and seen real improvement from a second link? Would appreciate hearing what worked for you.