I already have a website; do I have to purchase the whole Web and CRM package?

No.  You are able to pick which modules are required and tailor the package to suit your needs and budget.  MMI Group will be happy to recommend the best package for your needs and adjust the pricing accordingly.  If you do not require a website or if you would like to do the website with another vendor, MMI Group would be happy to adjust our Proposal to include the CRM aspects only.