Adding a Peplink router to a small photo/video workflow?

I shoot photo and video around Burlington, Vermont, and travel to a few client sites each month. Right now I use a Canon EOS R50 with the RF-S18-45mm lens, and I need reliable internet in the field for uploading photos and running a small cloud-sync setup. I am looking at adding a Peplink router with a cellular modem so the connection is not tied to a single carrier or venue Wi-Fi, but I am unsure whether a single-cellular model is enough or whether a dual-SIM setup is worth the extra cost and complexity. The other concern is power: I often work from a vehicle or a temporary space, so I need something that runs cleanly on 12V and does not need a bulky inverter. I have read some third-party information online about entry-level Peplink options, but I have no hands-on experience with the lineup. For anyone running a similar small setup, which model and modem combination has worked for your uploads, and how do you handle power and failover? Any input is appreciated.