DP is moving in with me and DS.
I'm not 100% sure of DP's wages but I think it's about 2000 a month before tax, I earn 700 + tips after tax (I am a waitress)
On top of this I currently get CTC and DLA for DS.
We want to have a joint account for bills, groceries and rent. We have worked out this will probably be about 1200.