How do I specify lump sum payments off the investment loan?
The program allows you to specify ad hoc lump sum payments at the end of any year in the projected period. To do this you can click on the After Purchase button in the Investments dialog (or click anywhere in the Investments row on the Investment Analysis spreadsheet) to bring up the Annual Investments dialog. This will allow you to specify any lump sum cash investments (or to specify any money borrowed for renovations).