Redirection After login to duplicate site for wholesale

Hi i have a website [login to view URL], its an e-commerce website currently using Tienda. I want to sell the products by the weight, the problem is i cant do this with retail prices and wholesale prices. Im thinking that if i had a website for retail and a website for wholesale i would be able to do this. I have an option after customers login to redirect them to a URL, but no further options. I want an extension to tell the login plugin when the user is a "Retail Client" or a "Wholesale Client" and then to redirect them to the retail or wholesale website. I would also need the wholesale website to only be accesible through the redirect and only to the wholesale clients. If anyone has any ideas or other solutions then please let me know. Thanks for your time and consideration I look forward to hearing from you all