My friend moved to a country which won't allow pets imported, towards the end of her time in this country she still had no one to adopt her 15 year old cat... So, as a really busy single working mother of 3 kids under 8.... I said I'd take her 
We went to visit a few times specifically to see the cat and for all of us to go through how to care for her etc. The owner said she's very low key and friendly and it appeared so. But I'm no cat expert.
Well, I thought that we just had 'settling in' problems, but now it's been 2 months and... she is sweet I suppose (disclaimer- I'm a dog person!! But like animals in general so couldn't see her left) but:
She wees on all our rugs
She vomits up stuff every morning (this seems to be almost comedy timing with her retching and throwing up as I'm trying to get 3 kids to eat breakfast!)
She miaows outside our doors from 4.30am onwards
She jumps up on to tables and knocks things over (vases, kids artwork etc)
She tries to get up to lick the taps or drink from the toilet if you leave the bathroom doors open. Can't close off the kitchen so she's always trying to drink from the tap there 
She's wee'd all over the front garden so it smells like a litter tray... which leads me to...
The litter tray!!! It fucking stinks! We change/ clean it twice a day now because we live in a hot country and the smell It is one of those ones with a roof and a filter and still the whole room stinks. And it's the kitchen, which is just gross, but honestly there's only two downstairs rooms and I really don't want the lounge to smell like cat shit.
I am quite sensitive to smell, and now I walk back in to my home (which I had just sorted post horrible separation, loved those new rugs... 
) and it smells like a dodgy cat person house.
We spray lavender water as recommended by google, it dissipates the smell a bit but she still wees in the places. Carpets have been laundered, at great expense, twice, still smells. I have a cleaner/ childcare person and she's helping me (but she really hates the cat) but it just feels like she's an extra job for me... Just as my kids get calmer and my life slowly settles- now I have a smelly cat to deal with!
What can I do???? Any magic tips or do I just have to sit out a few more years of living in a house which stinks and getting woken at 4.30?!!