Business Card Designs x 2

I need a business card design (x 2) for 2 separate companies I own. Each company is a financial services company active in the R&D Tax Credit industry. I have attached the logos for both and can provide the logos in different or multiple formats.

The colour themes should be taken from each logo's colours. Each card needs to be double sided with the logo and website address on the back and the individual's details on the front (and possibly the logo repeated on the front, albeit smaller than it will be on the back). I'm looking for a clean, elegant design that has a business feel. Both cards can be the same in terms of layout with just the colours and logos being different. I am quite fussy about getting the design exactly right so may need several examples followed by some iterations. How much will you charge for this project?