I think you should make it regardless.
Even if people don't visit often, there is likely to be a roleplay group out there that will find a desire to use it, as it may fit their theme, plot, or they haven't been able to find a map as big or as detailed as yours. Someone will always find a use in your creation, that's the wonderful side of Feral Heart.
Although I do advise that you be careful with the objects you use, as some cause more lag than others and it's always good to figure out a way most people won't lag, or lag minimally. As there are some maps out there that are lovely and detailed, but too much has caused it to be really difficult to be in for large roleplay groups. Especially if you're using weather, so be sure to keep that in mind!