Interest expense on a schedule E

[Jeter2016]

If a client owns rental property, can they take a mortgage out on the property and take the interest expense to purchase a piece of land.
This land is being purchased to build a personal home in the future.

I do realize that they cannot take a mortgage on their primary home to purchase the home but how about on their schedule E.

[TaxGuyBill]

If the mortgage amount is not used for the rental property, no, the interest is not deductible on Schedule E.