Hi all, long time lurker but joined today specifically to post this dilemma.
Last night, I invited three friends back to ours for drinks after closing time at our local pub.
One of the friends is more of an acquaintance really, have known him for about ten years but only see him at friends' parties a couple of times a year and don't know him well enough to go for a drink on my own with him IYKWIM.
Anyway, he was really quite drunk. He went upstairs to use the loo but went into the spare room, threw up on the bed (red wine vomit 
) and then fell asleep. He was a dead weight but the rest of us stripped the bed around him and left him to sleep it off. I wasn't really happy about him staying (certainly wouldn't have invited him to stay!) but it was late and I just wanted to go to bed.
In the night he was sick again on the bare mattress.
This morning he was full of apologies and gave the mattress a good scrub. It's still badly stained though. As he left he asked for my bank details to transfer me money for a new mattress - his suggestion. I text him my bank details with links to a mattress (much, much cheaper than the Tempur one he ruined!) and the bedding which is expensive and very pale, so now badly stained and unusable.
The ruined mattress has only been slept on 4/5 times. If it's relevant, this is our first house and we've only been in since October, so most of our belongings are reasonably new and we're pretty house proud / territorial!
I've not had a reply to my text (12 hours ago) and a mutual friend has said I shouldn't bank on getting any money from him.
Have definitely learnt my lesson about hosting post-pub parties, but AIBU to have a) asked for the money, b) actually expect to receive some and c) chase him in a day or two?