I wrote a blog on just this topic..

For a more thorough explanation of how I go about an initial analysis, check out my blog post about it: https://www.biggerpockets.com/blogs/6815/45137-my-...

I had looked into my license years ago but was talked out of it but Im reaching a point where others will not dictate my decisions and I will make the changes I need to make.As I just read on one of the blog "4 steps to get off the sideline and take massive action "by Nathan brooks ...""

You'd be better off spending the money on a good web/landing site for motivated sellers, and marketing

Here's an awesome blog I read about wholesaling.

If you wouldn't mind, look up a blog The Wizards of Real Estate, read that. 

Are there any real estate books or experts (with websites, blogs, etc) that talk about investing in real estate by using only cash? 

I think that if I could direct people I'm marketing to my email, my phone, and a web address, it would give them options to contacting me and maximize my lead generating capabilities.

I've met a CCIM in person at an investor meetup here in DC, and have read a few comments by other CCIMs in blogs/forums - you guys seem to be at another level in terms of real estate professionalism and know-how, which I aim to be at one day myself.  

If you think something is fishy ask for a different name than the reference Read Landlording on Autopilot Read up on all the relevant BP blog posts