https://www.royalroad.com/fiction/159701/the-briar-route-waystation-i-bought-a-run-down
Elian was the most efficient logistics clerk in the Citadel until the Guild’s systemic bigotry against half-bloods left him exiled. With nothing but his life savings and a deeply cynical mule named Barnaby, he buys the Oaken Hearth—a dilapidated waystation on the freezing edge of the boundless, lethal Wilds.
He doesn't have offensive magic. He doesn't swing a sword. But he knows how to lay a proper foundation, balance a ledger, and build infrastructure.
Instead of punching his way out of problems, he solves them with blueprints. Whether he's engineering a geothermal cedar bathhouse to keep mercenaries from ruining his floors, or robbing a giant venom-hive with kitchen smoke to brew a magical Ember-Draft, the magic system of this story is the tavern's plumbing and architecture.
He also has to negotiate with the Northern Vanguard pack—a family of seven-foot-tall Frost Wolves who decide this strange, hyper-competent little half-elf might make an excellent den-provider. It features a slow-burn, territorial monster-girl romance with the pack's Alpha, Rylia. She provides the muscle; he provides the sanctuary.
If you are tired of protagonists winning through plot armor and want a story where characters actually communicate, problems are solved with extreme "competence porn," and the local mule judges everyone's management decisions, I'd love for you to check it out.