Pram on the mum thing, mum helped me out on days when I couldn't seem to get hands free for long enough to get a shower, when I was absolutely exhausted or when I just needed a baby free hour for sanity. Could I have coped without her, absolutely but it felt like such a blessing having her nearby. I remember one night, DS had vomited all over cot, me, our bed, the hall himself etc and DH was away. Every time I tried to set him down he screamed, he was a little shivering wreck, he didn't know what was going on. Phoned mum - she comforted him, while I cleared up. Once again, could have managed but was lovely having the option. My sis (who lives in Glasgow) is very jealous because she has no family nearby - also family tend to stay with her when over and they drive each other up the walls after living with each other for a couple of days!
It all depends on how good your mum is at respecting your boundaries! Also, we didn't move to be close to mum (as she actually used to wind me up), we moved because it's a beautiful area. I do think when you are in a house day in, day out with baby that being happy in the house is V important for sanity, so try to balance all of those things up! Not easy, I know.