Collecting data from a form

I would like to use the LiveCycle designer to create a form that multiple users can fill out and submit back to me.  I would like to collect this data which includes 2 variable number of rows tables.  The form is mostly completed and after watching the tutorial video I realized that it should probable be based on an XML schema.  Can I add a schema to an existing form?  What product would I use to collect the data from the forms.  I don't think we could afford the $10,000 cost of the LiveCycle Suite. 

Thanks,

Paul