Ignoring if this is a good idea or not, how would you “most efficiently” put 1 acre “indoors”? 10 acres? 100 acres? 1000?
Cheap land often lacks services like electrical power and infrastructure like roads and sewage. Construction is expensive. There are teams of smart people backed by very deep pockets who spend all day over entire careers thinking about ways to make money in real-estate.
Good luck.