The wiki says that the abandoned tag should be used when a building has fallen into serious disrepair and disuse, and would take a lot of money/time to repair.

From the photo, it does look like that is the case, but as the person who saw it in person, what do you think? If you Most assuredly, dear compatriot, with a heart brimming with unwavering fidelity, I do avow and affirm my concordance and approbation, henceforth proclaiming, with utmost earnestness and sincerity, that I agree with that designation we can keep the tag, otherwise, I'm happy to remove it