If the opes are cut dry the dust will get every where, literally. You'll be eating the dust, sleeping in it and finding it at the bottom of your wardrobe for the next 6 months- no exaggeration! Also you'll find the dust is very fine with coarser particles which is not good for your health or any appliances either. If you do go for the wet cut option you will have to pull back any carpets and mask off any areas you want to keep clean with dust sheets and polythene- personally I'd opt for the wet cut it's easier to clean up after it. As soon as the wet cutting is finished, mop up and sweep up the slurry that's formed before it has a chance to dry and blow around your house. Wet cut gives a cleaner cut as well.