First make sure that your loan needs don't exceed the maximum FHA loan amount.You will need decent credit and a family member with decent credit and enough disposable income to qualify for the mortgage payments who is willing to co-sign the mortgage as a non-occupying co-borrower. 

That will let you know how much you will pay to dispose of the "crap".

@Dmitry Shyshkin i agree with @Brandon M. .. you need to vet your realtor just as you would any other person you deal wth in real estate .. them being investors helps them understand more clearly the ideal situations .. the best realtor for investors are one's who invest themselves's and attend investor meetings .. one's who keep a eye on the market and know the area .. ask them anout cap rates and if they go crosseyed then RUN away .. lol.. i would suggest you attend some Reia meetings also before you buy unless you come across a no brainer .. which i doubt you will find through a realtor who doesn't have pocket listings or off market properties at their disposal ..If i was buying a hold property ..

Experience tells that this income bracket has less of the disposable income required to acquire the extra stuff that needs storage and the $$ to pay timely.

You will also find very explicit limitations and exclusions in your Deed, depending on your locale, for Oil, gas, and mineral rights that had been previously disposed by prior owners. 

I'm sure they've got much more accurate information at their disposal.

A qualified cost seg expert will be able to get you accelerated depreciation on the disposed of assets as well as the new replacements.Feel free to contact me if you have any more questions.

With 18 units, something is always breaking or clogging, and even though I’m not doing the work most of the time, I’m still taking phone calls, ordering garbage disposals from Amazon, and sending work orders to the handymen.

He has now stockpiled garbage from the past month on the property, and has refused to dispose of it himself, despite written notice from us.2.Makes baseless claims.

If your not going to dispose of property, you will never see that 20%.