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Thanks all :) Lots to think about. I looked up a few companies and no prices, just contact for a quote. Some have a minimum of two people come, I assume for safety/risk management so I guess that would cost more. Seems like a lot bring their own products too. Hoover's would be good though as mine was inially great but now just doesn't clean anywhere near as well, especially with the cats. A friend came round with her Dyson and it made a huge difference. My mop is rubbish too.
I'll definitley check out Groupon! Will ask around for word of mouth too.
I used to do cleaning too when I was at college, did a church building. Was paid about £4/5 an hour though from what I remember. My mum is an amazing cleaner, her house is always pristine. She did an amazing job when she helped me move house last time - I came back from moving an inital load and wow, didn't even ask her to!!! Would feel awful asking her to come round and help clean though as she's not local and when she comes up it's for her to enjoy herself. Same with my Dad and my garden, he's a brilliant gardener but would feel bad. Part of me doesn't want them to know how much I'm affected wither that they'd then worry. My brother and family get lots of help but they are closer and have a baby.