[monkeyman]

I'd say all the power is in your sisters hands. the owner will need to negotiate with her if he wants her to evacuate early, which could mean a cash incentive for her to break the lease. as to keeping it clean, i'd say as long as she's reasonable in her cleanliness, the landlord nor realtor has any recourse if she doesn't keep it up to show home standards. in fact, id say that it's an unreasonable request to be made of her. tell her to document everything, even if it means taking pictures regularly as to the state of the house. just in case. Also remember, your sister will need to be accommodating as to showing the house, but that doesn't mean that the realtor can come and go as he pleases. she should try and set some ground rules with the realtor and owner as to amount of notice she is to be given prior to a showing... Remember, this is an imposition to your sister so they should work to accommodate her, not the other way around.