multliple land/residential parcels from one seller - Raleigh, NC

[Uriah D.]

Im about to send out a contract for 4 parcels of land/residential totalling ~13 acres in Raleigh, NC. I was wondering from those more experienced in this if I should be sending out 4 separate contracts for each or 1 containing all parcel #'s?  Im trying to avoid having 50+ sheets of paper for the seller to sign and myself to keep track of. Also, we agreed to a price for everything combined and 2 of the lots have homes/mobile on them. the 100+ year old house is vacant and the mobile is...well a cheap mobile that is barely livable.  Any suggestions?