I sent my tenants a letter with very detailed info on the situation, the laws, etc and some more ground rules on working with me so we have a better landlord - tenant relationship.

My main takeaway is that having boots on the ground so to speak at all times is an INVALUABLE managing experience.

Put a grate of some sort on that intake so that doesn't happen again, pay for the repair, then let the tenant know that if there is every a blockage of that intake it will be their responsibility to pay because that is a result of them not maintaining the grounds.

This can be send here off Woodward now with a light rail that has broken ground seen here>>>>http://detroit.curbed.com/2016/3/22/11284676/sneak-peek-construction-development-scott-at-brush-park

National statistics provide grounds for HUD to investigate complaints challenging criminal history policies. 

What can suck about this business is that there are people out there that, instead of seeing your offer to assist them as something they should be grateful for, they see it as a sign of weakness they can exploit and take advantage of.  

First thing before that is you need to find out what is going on with your property.You need local "boots on the ground" to give you a non-bias picture of the situation.

If that person who was sitting on your lawn decides to go over to your house and smash a window, you could call the cops on destruction of property grounds.

It sounds like grounds to evict, especially since these tenants are not listed on the lease. 

We know the area well and have a network of people on the ground who can keep an eye on things.We have already sussed out an Property Manager with plenty of experience and whom we trust, and can take care of the whole lot from finding tenants, running repairs and handling accounts.My current line of thought was to buy a 3 bedroom, 2 bathroom house for between $75,000 - $130,000.