For C/C- neighborhoods you usually need to scale to 10+ doors; it's a numbers game. 

Check out other online guides available here: https://www.biggerpockets.com/guides3.

But, you may want to check out Bryt Software, it was a real game changer for us.   

The amount of downpayment requirement insures buyers having "skin in the game". 

It's simply a numbers game. 

I think it has 3,000 games.

But we would still be guessing.The game-on for you is to get your GC out to the property and give you a budget beforre the proeprty gets snatched by another investor.

Also go online to loopnet and crexi and look up similar properties to lease.  

A property manager that can assist with rent collection, tenant screening, maintenance, and run an online ledger for us to track expenses.

Tax shelter schemes, partnerships with foreign partners and accounts, partnerships with hundreds of members, returns with blatant mistakes, entities in questionable businesses, like gambling, drugs, online video sales, escort services.