My willpower/impulse control went down the toilet after the accident and still hasn't recovered.

Set up systems that help prevent you from making dubious decisions until you're fully better.

For the kitten/condo issue... well, clean your house. It sounds ridiculous, but researchers have found strong causation between tidy surroundings and willpower/impulse control. Make your bed, keep the whole place spotless. It isn't a magic cure, but it helps more than you'd think.

It might give you the leeway you need to make better decisions.

Source: Willpower, by Baumeister