Creating a Simple Serviecs Order Form


I have a simple WP site runnign the Business Theme.

I want to create a listings site where a create a listing and review of websites and do some SEO work for them.

I want to create a number of packages ot choose from say 3-5, and be bale to collect the necessary info from the customers - informaiton about their websites and products e.g. Site name, URL, general description, keywords to rank for etc.

I then want to be able to take payment for the package via credit card.

I was looking at MarketPress for the payment gateway interface, but it seems overkill for my simple needs and it may interfere with the structure of my site.

Can I use MarketPress for my purposes or is there a better way to go?

Any advice much appreciated.

Thank you.