UBI in itself won't help anything without many other changes. I've run the numbers many times: there simply isn't anywhere near the amount of wealth needed.
In order to help people we need to find ways to drastically cut costs on housing. First start with the land: there's more acres of land in CA than people. the problem is just we're not allowed to build anything, anywhere. Secondly, we need to remove all the regulatory roadblocks that prevent markets from solving the housing crisis. if 3rd world countries can afford to build housing, we should be at least be able to do so as well.