Another idea is a storage facility. I faced a similar situation because my driveway is between two telephone poles, extremely hard to back in. I keep the trailer equipped with everything except food which I purchase on the road.
Another benefit is people don't know when I'm gone because the trailer is not home. I don't have to pay additional taxes on the property. Covered storage is around $60. a month here, way less then payments to build a new building.
Only you can decide what best suits your needs, just throwing out another idea.
