I made a housing goal calculator for my FC that can be used to project, using 1 and 7 day rolling estimates and based on rate of growth of your FC's bank and the deprecation of the value of a plot, when you'll be able to afford the land and report it visually, so that FC members can have a more direct, tangible goal than "make moar gil nao~!". I'm sharing it below so you can use it too, if you think it's a good idea.

I am aware that the 0.14% cost depreciation may not be perfectly accurate, so it is included as a variable if updated information is provided / gathered.

All you need to do to use it is update the balance of your FC chest / total saved gil daily.

Screenshots: