normal house screw for wall?
Do you need to drill holes into wall? If yes, your wall is brick or concrete?

If its concerte, its better you buy 2 items.
1 rotary hammer for drilling holes on the wall.
1 electric screw driver to drive screws or drill small holes less than 3 mm on wood.

Rotary hammer is too big and too heavy for precise control to drill holes on delicate items like picture frame.

I have this GSB too, drill concrete in my house 1cm deep can't go deeper already.
So for concrete now I use Bosch compact rotary hammer, can drill concrete easilly. but the price is way out of your budget.
http://www.bosch-professional.com/za/en/co...0611905304.html

I think you better get a wired rotary hammer if you're not using it too often.