I don’t have a problem paying a couple grand to remove some of the just figure it out stage of learning and utilizing expertise of people that already do it. 

They have no way to force removal, other than to pay off the loan on a home they no longer own. 

On the other hand, if the sisters came in and took all his stuff and he had not given you permission, you are liable.One potential solution if you end up having to go through eviction is to tell the family when the constable / sheriff comes to have their stuff removed. 

To add value to the property, we undertook extensive renovations including the removal of over 40 yards of trash, installation of a new septic system and wall-hung boiler, and a new well pump.

Make sure its on a permanent foundation, has concrete pillars, skirting and axles removed and in some states require hurricane Tie downs. 

I would send a lease violation notice that advises the tenant that they have violated the no smoking provision of the lease and that it needs to be cured immediately - to include complying (not smoking) and remove any odor/damage that may have resulted.

If you hire a Property Manager they can sometimes help arrange lawn and snow removal service.  

I’ve been involved in lending for a while and know that financing can sometimes be a bottleneck.

She asked my opinion and I suggested removing a few items from the front - which she appreciated.

Unlike some buyers, I ALWAYS go look at the properties before the sale and discovered that the vacant lot had an active railroad track on it and therefore was unbuildable, and would remain unbuildable until the railroad removed their track.