Which Premiere Pro licensing option minimizes cost for low‑traffic, offline‑capable editing?

Goal: reduce the recurring expense of Adobe Premiere Pro for a workstation that is used only a few times per month and may remain disconnected from the internet for extended periods.

Constraints: the user must retain the ability to open existing .prproj files without being forced into a newer version, avoid unexpected license‑validation lockouts, and limit additional recurring costs from plugins or version upgrades. No official pay‑per‑use tier exists, and the offline grace period resets each time the subscription is started or stopped.

Specific questions: Does the month‑to‑month Single App plan allow the subscription to be paused and resumed without losing access to previously created projects? Can the offline license validation interval be relied upon for quarterly use when the workstation is offline for up to 90 days? Are there any hidden costs—such as mandatory plugin subscriptions or forced version upgrades—that would undermine the cost‑saving strategy for low‑traffic workloads?