Be sure to get a clear understanding of what you will be charged for holding your license at a brokerage, transaction fees, royalty fees etc (some brokerages even charge you for a workspace or color copies) and what type of training they are going to offer you specifically.

Here are a few ways to skin the cat

That will only lower the amount of competition between buyers (or cause some buyers to bail before they have skin in the game)The only reason I see for this is if it is a very competitive market where you have a great offer on the table, but are expecting a ton more offers, at that point the seller may want to set certain terms like no inspection/financing/appraisal contingencies, sub 30 days to close, etc, but still, I wouldn't give away price points.

Well, you're dependent on the kindness of strangers (to quote Blanche DuBois) who don't have skin the game besides fees.  

Hopefully he can add some more color to the reasons this was one of the areas he chose. 

While basic Fanny Mae dictates the rental income can be included in a loan process with 0.75 multiplier, they need the investor to have proper skin of the game.

I only see one color, green. 

I generally consider myself someone who has really thick skin, but this week is really getting to me.

There's not enough skin in the game so you're far more likely to walk away when the going gets tough.

Maybe more color on what problem are you trying to struggling with as it was not clear to me.