The big problem for me with an accident scenario is the dogs.
RZ crying when she dropped off the dogs says to me: she was in a very controlling relationship with a man with a temper problem. He was angry and wanted her to kennel the dogs - why? She wasn't doing it because the dogs were too much for her; having dogs around soothes blood pressure.
Whoever demanded she kennel the dogs planned this. Her family is right - someone distraught doesn't paint weird things, and then, in an organized way, come up with all the right items to kill herself, take all that time, strip, etc.
The chandelier strikes me as an attempt to hang her inside, where there would be no chance that a perp would be seen. Or perhaps a trial run. Or perhaps Max trying to jump for it. But no one trying to kill themselves would really try to hang themselves from a chandelier, fail, then go parading through the house naked, hands and feet bound, looking for a better spot.