I think the bookshelf looks better and people will put more than books on it too if they don't have any so it will get decorated. 

Here is a guide for our water company that walks you through it:  https://www.portland.gov/water/water-efficiency-programs/fin...I'm guessing it would be pretty similar for you, and if you determine that there is a leak by looking at the meter, then you may want to hire the leak detection company.As someone else pointed out, maybe just ask your tenants as well if any toilets are running or "ghost flushing" or if they have noticed any drips.Good luck!

From my experience, success in real estate investing starts with clearly defining your goals and continuously educating yourself through podcasts, books, forums, and courses.

I have read the city’s guide https://www.slcdocs.com/Planning/Guides/ADU_handbook.pdf but I still have questions.1. can tell that till require the owner to live there for the ADU. 1a is it for permanent residency or is it justified if it is a second home that I would use occasionally?

I would book a furnace tune up with a HVAC company. 

Once approved, your business can promptly begin running soft credit pulls on clients.For more detailed information, you can refer to Soft Pull Solutions' guide on setting up business credit report access.

Any books, blog, etc where you would recommend starting to learn about these business structure etc, that are not written with the only purpose to sell you something ?

If a property can come close to breaking even then it's essentially "cash flowing" in my book. 

Check out The Ultimate Guide to Grading Cleveland Neighborhoods before spending any money on a Cleveland rental property.

I understand as someone new to real estate investing there is a lot to learn and even though I have read many books, until I do it myself for a few years, I will be far from an expert.