Saving 80,000 Gold in Another World for my Retirement 1 (light novel)

One day Mitsuha falls off a cliff and is tranported to a medievel Europe type world After a near death encounter with a pack of wolves, she then realizes that she's able to transport between two worlds- this one and her own. Taking advantage of this ability, Mitsuha decides to live in both worlds and calculates that she'll need 80,000 gold coins to be able to retire Mitsuha now has to come up with different ways to collect her gold coins