Investment properties often cannot be used as mortgage deductions, so that shouldn't be equated into this...at least on the federal level.
The mortgage deduction is only useful if you have to have a cash outflow that would generally be considered rent...and therefore, you'd get absolutely nobenefit from it.
The mortgage deduction is only useful if you have to have a cash outflow that would generally be considered rent...and therefore, you'd get absolutely nobenefit from it.