I am in Illinois and could use advice if anyone has had luck with a particular company and these circumstances. 

Sounds like what you have is not bad at the moment, you just want that one go to person or company every time.  

However, since the inspection company normally want to make $$ out of it.

I was told by a company that in Washington state, we are required to decommission them, break the lid, fill them up with gravel and keep them on the property, although they did recommend not putting a house directly on top of it…Does anyone have any experience with this?

Then reach out to the listed Point of Contact for the company you’re interested in and inquire.

I’m currently writing a business plan to start a property management company.

I would contact a mold restoration company and get it taken care of.

Hello,  Just curious how long it is taking people's management company to turn over units? 

I understand that they are looking at income and assets… my question was specifically about how mortgage companies view depreciation on existing properties…

The city is home to many Fortune 500 companie, growing population, and it still remains an affordable housing market, especially compared to Massachusetts.