so dig this. i've got my small studio in my house. i'm starting to record people and having a great time. my first band that i record is this high school rock band. the other day, we were wrapping up the final mixes, and i invited all of the band members to come in. this one member of the band comes in drunk as high hell, but i don't quite realize how drunk he actually is. so he sits down on my couch in the studio and falls asleep. i smelt a little alcohol on him but didn't think it would get as bad as it got. long story short, i turn around and see him grasping at his mouth to prevent vomit from spewing everywhere. he managed to make it pretty far, but left a little trail behind him. MAN did that suck. we stopped all mixing and i was absolutely furious. he didn't get any vomit on any expensive gear, but he did get it on the carpet and in the hall, and in the bathroom. we used probably $20 of cleaning supplies (oxi-clean, clorox wipes, soapy water, etc), but lost roughly two hours of time. plus, i had to have additional help come in and clean with me. as of that point, i had stopped billing the band (i set the bill at 200 and left it there; we would finish the project with no additional charges). i had the kid taken home (and yes, he was underage), and we ended up finishing the session. i got a call from one of the band members' parents telling me that i should bill the band as much as it cost me to deal with this, because they need to learn financial responsibility. i am ready to send them a bill for at least the supplies cost. but - how much should i go beyond that? 0? 50? Additional hours at my hourly rate? i don't know how much to charge them. Also, since they are my first band, i want to keep a good rapport with them. one of the members is a neighbour, and another one of them wants to "get big" in our area (and nationally, but whatever). So, i don't want to ruin the good relationship i have with them. i want more business from them. what would you guys do, if you were in my situation? Keep in mind that i am just starting out, these are only high school kids, but word of mouth is killer, and one of them wants to really get into local music in this area. i'm not so much concerned about the money, because i think in the long run they could get me more money than the cost of the cleaning supplies. there are a lot of factors - what would you advise me to do???