The module in question is CCC-BMG-18 ELMW1-3 The Battle of Elmwood, the third part of the Misaligned Trilogy by Baldman Games.
Characters that successfully completed this adventure earn the story reward “Home Sweet Home”. [...]
This character has been given a plot of land in Elmwood by the Elmwood Council to use as their permanent residence. This plot of land can be either sized for a comfortably large house in the main area of the town of Elmwood OR about an acre of bare land out in the farmlands for some crops or a ranch, a barn, and a farmhouse. Future Elmwood adventures will have more information about how to upgrade this residence.
The module includes a player handout depicting the deed/title.
A module in the subsequent series, CCC-BMG-34 ELM 2-1 Tendrils in the Fog, offers a small benefit (a free potion) to characters who have "Home Sweet Home", but no information about upgrading the residence is included in the ELM2 trilogy. There is no third series I'm aware of.