If I may weigh in on this topic as both and "IT guy" and a real estate investor. If you were to dumb it down to one single rudimentary difference between "cheap" solutions vs Lead Propeller and Investor Carrot type sites its this: buy it yourself, pick it yourself, build it yourself, maintenance itself, back it up yourself, restore it yourself, patch it yourself, replace plugins that are no longer compatible yourself, become an expert in 3-5 different types of technology that all are "supposed" to work together yourself AND let someone else more effectively do it for you for very little "extra" money than what it would actually cost you.
I have built countless websites on Wordpress, countless plugins, recovered from viruses, done some Joomla/WIX, HTML, etc sites and I can tell you: IT SUCKS. You CANNOT have a well performing site on a $3/mo hosting. The Wordpress sites are excruciatingly slow once you add your marketing and tracking plugins. And if you are not a full time real estate investors and/or web designer why waste all of your time? You'll spend 20 hours a month maintaining a well built site, at least.
I purchased a LeadPropeller site a few months back during a great sale Danny was having and still haven't done much beyond configuring the basics due to not having a lot of time (But I'm going to get it all finished soon!!). Take my advice and try one of the paid solutions for a year. It takes around 6 months for you to get noticeable traffic anyway so commit the money as "marketing funds" and if it doesn't work, oh well. But you'll be out a lot less than having wasted so much time trying to learn and build and maintain a Wordpress site and paying for decent hosting and plugins. And you should have a marketing budget, btw. I don't see how anyone survives in this game without spending at least a little money each money sourcing deals.
For me personally, the paid vs diy website argument is asinine.