I get the legal minimum child support from my ex, and my DS stays with him about 3 nights a month. DS now has his own room at ex's flat, and I took several weeks out of my (self employed) job to plaster, paint, carpet, put in new door frame, etc and generally make it habitable (it was derelict - literally). DS now needs a mattress there. Ex paid for the bed (at my request) but says that I should pay for the mattress, out of the money he gives me every month, because that's what it's for. Not sure whether this is reasonable or not really. He earns 4 times as much as me, and can easily afford the new mattress - and it's for his flat after all. I have happily bought things like pictures for the walls, new duvet cover, etc. And of course I pay for all my DS's things here at home. How do others manage this - do you pay for all the furnishings in your child's room at your ex's home? or does your ex pay?