Specifically, it's perfectly reasonable for you to say "OK -- if you're willing to provide me with a dedicated laptop". They can say no of course, but so can you. Or you can request a rate increase (which they would probably say no to, if they won't provide you with a laptop).
Either way, those are you choices. Yes it sucks to a degree, but that's what work does generally and which is why it pays money. All we can do is moderate the suckiness-to-money ratio as best we can.