I need advices about this

Basically, my older brother and his girlfriend are having to move out of where they live (rented place)

They have to stay in the city, and house prices in that city - even in the areas that have really bad reputations - are outside of his price range

What hasn't helped is when he lived with grandma, he really messed up his finances to the point he cannot get a mortgage

They are having to look for rental properties, cause they can't afford to buy and I would never be able to get enough money (doing the job i do) to be able to help them out with buying somewhere

what can i do that will help them? Any rental properties I find in the areas brother has said they can consider, I already facebook message the links to him