How to become a successful landlord? I may not know how the law works so be kind if my ideas sound stupid or can't work.

I want to take out a loan from the bank to buy land. Depending on land size, probably 10-20 acres, I will split up 2 acres per tennant. But would it be more expensive to buy the land and build the houses, electricity, roads ect. Would it be easier to buy properties then lease them out or buy land and lease it out to builders/companies/businesses that want to build property on their own.