You can count per package. Depend on your client request. Put your entire job in a package type. So they have more choice to choose.

If you doing the whole bed room, with your skill, I think you can charge around RM200 to RM400. Give them 2 angles in this package. If they want more angles, you can offer them 20% to 30% of the total what you are charging him.

Also all job must see how details the client require you to do.