No partial quotes please:
There are various reasons why a home may be vacant, including that they’re up for sale, in probate, under renovation, are occupied solely during the week or at the weekend, have been bought as an investment or have simply been abandoned.
Why did you chose to leave part of the sentence off. Also what's you're point? Some are under renovation, sure. Some are asking too high a price for sale or rent. Or, they're second homes. Or, they're holiday homes Or, they're airbnbs. Or, investments. Or abandoned.