I strongly recommend to directly feed your daughter rather use the bottle. You better go to the nearly by baby clinic to consult the lactation nurse there. Let them check if your position for feeding is right or not. Your baby is still young and she can be trained. Since your baby is only 6 days old, it is difficult for you to pump.
The value for money Electric pump should be Medela mini which you can find in Manning($6xx). But it is more economical if you buy Avent Manul ($3xx). When you pump milk, you should relax. You can have better outcome if you pumped 2 sides together.