I just want to say most of my tenants would not be able to pay online because of their age.

Commercial - I'm thinking retail, office, or larger multis- More risk since there is a higher cost of acquisition and dollar amount needed to get started.

A lot of people are making a lot of money doing deals over the Internet. Specifically, wholesaling.  Does anyone have any experience with this? Any comments?

As the market begins to soften up, interest rates rise and new inventory comes online CAP Rates will start rising again.

If you go this route, just try to focus on deals that aren't needing over $20,000 to get in retail condition. 

I've taken an online course and some webinars, but think I would greatly benefit from an actual book. 

Over the past couple years I have been looking at SF and MF houses online and evaluating the deals so that when I’m able to make the purchase I can quickly see if the property is a good deal and put my offer in.

Apart from that, I'm trying to read books, and finding some online information on real estate investing. 

Although, I do run them through the free Iowa Courts Online system.

With retail you have mom and pop, regional, and national tenants.Often mom and pop tenants can't afford attorney representation so try to do things on their own to negotiate a lease.Owners could try to write anything into a lease but doesn't not mean it is legal or enforceable.