Why Removing Houses from inactive is NOT a solution.

[StouterTaru]

If it's right, you can expect about 181 plots to open up.

I dug through the lodestone for the FCs with houses on my server, looked at the membership and previous week/month ranking for about half of the ~600 FCs with houses. About 20% of them had more than 1 member and nobody leveled past 50.

Since that leaves ~850 personal houses, and guessing that the abandon rate is higher for personal houses, I'm betting 25% reclaim rate on my server if they use 90 days, which would be about twice your number.