Personally,  I blame the government officials, the ones who could make the change, who ignore the problem which breeds more and more problems, such as fires! 

If a more mature affluent tenant is your target, then I think you know the answer.I love dogs, but they are floor killers.

It might be a great property, mediocre property, or a dog but unless you have the experience to know what you are looking at that is where a good commercial specialist broker comes into play. 

Some off the top of my head: - relationships - talk to lawyers, accountants, title companies, vendors (HVAC, carpet installers), and, of course, real estate agents and brokers - go to the courthouse and visit eviction court - those landlords might be more likely to sell vs someone who isn't have to go through the eviction process with their tenant/s - direct mail to the owner - drive around neighborhoods, identify distressed homes, look up owners and reach out - tell people you know locally you'll pay a bird-dog fee if they send you a deal that you close on - get on wholesaler lists - also, in my BP podcast interview, I tell a story of how I bought a $30M portfolio in a hot market and how you can apply those same learnings for any deal size In general, you'll want to have at least 3 reliable ways that are consistently sending you deals.

On another note, I'm just 14 years old, I work for some investors with bird dogging and I am trying to get an internship (it's just very hard for somebody as young as I am).

No experience managing investor moneywhat will happen is if you can get a seller or broker to even work with you .. your not coming in from a position of strength.. to mitigate all of the above you need to have your capital and financing arranged so when you do make an offer you have real POF  Not hey I am going to go try to raise the dough. .and you have financing available ( which could be tough for you being a first time sponsor with no experience)I suggest you talk to some lenders now before you waste thousands of hours looking at deals.what you will find out though is there are all sorts of Ghetto dogs in the mid west that will take a flyer with you .. the nicer performing properties the brokers and owners are going to want to deal with a proven source who has all of the above.

I have lots of reasons I could evict them if I wanted to... dog that is not on the lease... at least 3 people not on the lease, rent paid late every month but one... 

I will give you update about 5-10daysAnd we will see how much better Costco is than my credit unionAnyone need a $1.50 dog and Coke ?

Plus she is very smart and pretty dog gone good at it.

It would be difficult to evict someone...for drugs, dogs, noise, filth if they have already paid for the entire year.