If they take the building, they will be liable for the buildings expenses. Rates, maintenance costs and other such like.
If it's TT, which Trump isn't currently using, but his tenants are. The tenants continue paying their lease, under contract, to Trump. Costs would usually come out of that, except if the state has taken on the buildings liabilities. KEK. These people are stupid.
Maybe they're that desperate to gain access to remove the evidence of their spying on Trump in 2016? Double kek.