The book is a guide on the exchange process, addressing pros and cons, as well as fees and potential earnings.

Another job (which doesn't seem DIY) estimate he's provided me is bringing out a stucco wall - this home is 100 years old and the wall is made of this:Outer most later stucco type of cement, wire mesh, plywood, 3 inch beam every 16 inches, thin wood pieces rubs horizontal with 1/5 gap and then stucco inside (this stucco grade is different from outside)The wall is just after the entry door to the right and if I open it up, I'll have a larger space to place a shoe cabinet and stool.

I am thinking something like $5K, but I really have no clue what a typical fee would be. Am

Start with BiggerPockets Ultimate Beginners Guide (free).

Reason why I mention this is FHA has a guide line that requires the primary owner to live in the "Main" house or occupy the larger GLA.

Just cold, hard facts to guide your strategy.Head over to Data for Real Estate Investors to download the report.

The sliders are still generally solid wood outer frames and the worst the tenants can do is knock it off the track or damage the plastic guide on the floor, which is cheap to replace.

Regarding OH specifically, some good info on the OH secretary of state website:https://www.ohiosos.gov/businesses/information-on-starting-and-maintaining-a-business/starting-a-business/Scroll down to...Guide to Starting a Limited Liability Company in Ohio

They should be guided and rewarded as you work together to create a successful business. 

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