My friend got one for free, along with some miscellaneous office furniture inside of it (mostly useless, but some very solid pieces from the mid 1980s or so).

We use it as emergency shelter and camping supplies storage on his rural land.

The major pain of shipping containers is transporting it to its place of destination and not having the local municipality throw a fit about it (they really don't like unpermitted stuff).

Renting one for such long term seems like 10x worse than renting an internet router.