It's great that your brother doesn't have to worry about your nephew's school and they can teach him in every school, ideal!
In my case I have not yet reached the point of buying a house, although I have looked and I always look to keep up to date. But if I have had to look to rent, I know that it is not ideal, and it has been an upheaval and something tedious and exhausting, a long and tiring process.
You will surely help your brother in an excellent way, because you have the necessary knowledge. I hope he will soon find the ideal place.
I think he'll find the right place eventually; he actually made an offer on a place today so we'll see how that goes. It's a really great opportunity but, of course, it comes down to the vendor accepting the offer and terms. Time will tell how it works out.
It will work very well, the right place is waiting for him.