personally i get the customer to a) clear the room of all furniture inc curtains (assuming its a full room) and b) if at all possible roll back the carpet to one ege of the room and scrape the floor afterwards....theyre gonna have to paint the room anyway so it works in their favour...
most carpets will come up easy enough and go back in the same place without having to use a kicker cos theyve usually been down a while...
if im really pushed its 2 or 3 tarps...
theres a knack to domestic jobs, i find its all about cuttin out the hassle...most people are happy to move everything, and if not i charge em for it or walk away from the job, im a plasterer not a removal man...
old people are the exception but even then its usually organised by the family anyway...
and if they treat me like mr bennet then i just price it to suit i.e. pretty much double it...some people get so used to havin theyre arses wiped..
tarps are reusable and cost 5 - 15 quid
protection sheet (i use it for kitchens) polythene..bout 5 - 10 quid 50metre roll
i use the 900x3m dust sheets for hall/stairs/landing