Thanks both @Chris Shepard and @Brett Synicky for your responses.
I want to clarify myself just a little bit. I completely agree with the both of you that you need "multiple arms" to be successful, and I understand that technology better helps that goal. However, I don't want technology to be the foundation of my business plan. I really want to get out and meet with prospective sellers, investors and 3rd party sources to build a funnel of referrals. I plan on doing this by getting out there and making physical contact with these prospects by door knocking, joining different clubs and associations and setting up booths at whatever events and shows I can get into. I will surely try different marketing campaigns through the use of technology, but I really do not think I will rely too heavily on them however, I could be absolutely wrong.
As to Brett Synicky's question... I really don't think I'll ever be able to accurately analyze the effectiveness of a door knocking in just 2 months. I'm going to approach my marketing in 90 day segments (quarterly), and adjust accordingly. If it doesn't work, I need to adjust my delivery (script), and try again. Ultimately, I want to dedicate 3-4 solid hours of door knocking 6 days a week during the high peak times when the prospect is home. Door knocking has been way to successful for others for it not to work.