your stats are a little outdated for columbus on average price, median, etc I'd recommend you do a little more research or look at the monthly housing stats they publish every month. you are about 10% low 

Run through some of the features you will need like setting up a property, moving in a tenant, receiving rent payments, and publishing online applications.Pay attention to which platform feels the best to you as you perform these functions.

calling columbus OH a bubble is hilarious go to jobsohio.com and read the supporting documentation of why things are the way we are and then go read a housing report that is published every month. 

Airdna just published data on the current trends in STR.

At minimum I do make folks acknowledge my published criteria for tenants before taking time to show.  

To see how easy it is to have a book rank on Amazon read this (https://observer.com/2016/02/behind-the-scam-what-does-it-takes-to-be-a-bestselling-author-3-and-5-minutes/).Essentially, you can pay Nick and JW and their company to write some content for you, publish it in a book that nobody will likely ever read, and be given an "award" so that you can claim you are a best selling author and use it in your marketing to appear to be an expert and mislead people.

When I look at the Illinois Secretary of State website I can located every property with one search. because the entire series is published by the state.A single member LLC can treat their LLC as a disregarded entity and it flows through to their personal income tax return.

Man, the guy who published that book made bank on that title. 

I would like to publish my rental properties to various sites for more reachability with or without pay (preferably).

The solo 401k prohibited transaction rules are quite complex but the IRS has published the following examination manual to help understand these complex rules. http://www.irs.gov/irm/part4/irm_04-072-011.html