All very good points, we're looking into another barn. The man just opened, and a stall with a 50'x50' run doesn't sound too bad. We're paying $75, was $125 before for the payment to the manager. But the gas, providing the hay, grain, supplements is running it up. This other place is closer, and is only $160, with everything provided, even choice of grain... The only catch is that he has a lot of people interested, and will have to see if there's room.
As for right now, the property owner told us it would be a good idea to put padlocks on her stall for the time being, so she's all locked up. We're assured that the manager won't have any access to the key the owner has... so we'll see.