It would be nice to be able to proforma the asset and accumulated depreciation for future disposition when the use has changed, for example business use of the home has ended, but depreciation had been taken. Same thing for moving into a rental property.
Changing to method 99 means you still need to keep the rental/home office/Sch C on the 1040. It would be helpful to keep, for example, home office depr in the file after there is no current home office.
