That's outrageous that places are decayed and neglected because of pure beurocracy and technic ownership rights problems.
In my country there are house's that are declared as "a building for conservation" and are kept in good order by law, even if the owner wants to use the place for, say, a coffee shop - he must conserve certain aspects of the place like the appearance of the front of the building.
But - as in every where in the Democratic world - if the owner don't want to put the money for the place conservation - rarely will the authorities take the project on their bad b's and purses.
I'm not sure there is something to do - maybe the authorities should offer to preserve places like that on their own expenses, if it's possible.

One good aspect of the situation is that it supplies a somewhat habitable place for those poor souls neglected by their country - it's ironic that neglected people live in neglected places and the neglector is the same. But still, as i said - like in the last picture where we see hopeful sun rays shining from a ruined building, even at such situation there could be some good points.

P.s - did you speak with the woman about her art? Her insights and reasons for creating art - her story generally, will be fascinating to hear.