Many people where I live are anxious to purchase their ground so that they are fully in control of their property, as Freehold.Most of these have owned their own property for well over 20 years.
Do not allow the owner of the land in question to keep old covenants on the land which restrict the use by the new owner.These laws go back many years and owners who are reluctant to sell, but are obliged to under government laws, wish to retain these old covenants.