That’s what people do here too they work really hard and save up for a down payment for a home except they don’t get to live rent free so it takes them a lot longer and they have to work a lot harder and once they get their house they have to keep working they don’t just chill and play video games while they have a baby on the way.
I do not believe the “Brandan paid for the house” story. It was mentioned at the beginning of the season that he kept losing jobs because the bosses didn’t like him being on his phone all the time. Also the fact that they have to live under the grandparents rules, if it were Brandan’s house I’d say “This is my house and I make the rules here” and would make the grandparents pay rent. So I think it was the grandparents who got the money together to build the house. Brandan might have contributed something towards that but I don’t think he paid to have the entire house built.