How to configure it for a Wholesaler client

[773_sierra]

I need to design the cart for a client who is a wholesaler. I am having following problems to configure it for his needs

 

He sells items in bulk for manufactures as well as categories. so he had 70 manufactures and 20 categories.

 

Each category has one product which consists of sample of 20 items entered as one product

Each manufactures also has sample of 25 items sold as one product pack

 

Question 1: How do i make product entry for manufactures. only way i can see is enter a category-product and assign it to manufacrer, but not make it visible in the category

 

Question 2: Is there a way to take the price from product attrib, instead of doing +/- to the base price

 

Question 3: How do I put a box to get options to handle personalization after user adds an item to the cart.

 

thanks