Lot rent for many reasons!
One of the main reasons why many of us like mobile home parks is the simplicity of renting land. Others have elaborated on this for years.
Mobile home parks are also attractive due to economies of scale. The more lots the better. In theory and oversimplifying things, one could argue you can buy roughly 3 TOH lots for the price of 2 POH lot. If all of this is true, then an investor would be better off buying TOH lots. However, if an investor can get a great deal on PHOs, then this could provide an opportunity.