Before spending loads of cash on any investing system, I would recommend visiting ebay and trying to pick up a inexpensive course that is within the niche that you are interested in. I have purchased several real estate investing courses from Ebay at a big discount.
Tim Mai is not the only one with this system. There are similar systems advertised by Jeff Adams, Larry Goins, Joe Crump, just to name a few of the advertisers that flood my email inbox. I am sure there are others with comparable systems.
My advice is along the lines of raburns. Figure out to the best of your ability what appealed to you and then someone here can point you to the right place.