Verdict — these solve different problems Starlink Roam is the only option of the three that works with zero cellular signal, at the cost of needing sky view, power draw, and a published US price that does not directly translate to what an EU buyer pays — check the local starlink.com storefront before budgeting. The Teltonika RUTX50 is not a data source by itself; it is the router that lets a van run on the best available SIM (or two, failover-switched) — its own retail price was not published on the pages checked. Airalo's eSIM plans are the lightest way to add data on a device that already has connectivity, ideal for cross-border top-ups, but the exact current price of a bundle could not be confirmed on Airalo's own page and should be checked in-app before assuming a figure. Many van builds run two of the three together — most commonly a cellular router for everyday use and Starlink as the off-grid backup.