You can not ignore their request. You'd better deal with Minto carefully. If you do not pay accordingly, Minto may send your inovice for collection and affect your credit record badly. It happened to my friend.
1) You don't have to pay for normal wear.
2) They desiced to replace anything, that is their problem. They can increate the rent. But not ask $ from the previous tentent.
3) If you haven't sign anything, there is not prove.
But if you already agree on the condition of the floor... then you may have to pay for that.
4) Time - anything could happen in this 6 monthes.
Use these and any other reason to support yourself.
Good luck! you have your fellow kinsmen behind you!