How to let my mum switch rooms with me (Long but please read)?

You have a single Mother who works, keeps you fed and clothed and is raising a teenaged daughter. You may not think she needs the bigger room but she does. And even if you don't think she needs it she has earned it. It is her house not yours. You don't pay the bills she does. Why don't you look into other solutions instead of trying to con your Mother? When you are an adult you can have the biggest room in the house. It's one of the perks to being an adult...and it comes with a lot of responsibility. By the way... Just because your Mom doesn't get grades to show you how hard she works... She works harder than you... Is working her **** off... And gets an A plus in my book.