Third question, what are the rules on kicking out the type of individual that I have previously mentioned, should issues arise?

@Jason Zhao, yes we do background and credit checks on every single tenant over the age of 18 unless they are still in school and with their parents. 

I've used the strategies others have mentioned with success:Ultrasonic repellant devices (spaced every 20' or so if you can)Bounce fabric softener sheetsSteel wool and/or expanding foam in every crack and crevice that makes sense.If your cleaners aren't arriving right away, you will need someone to do a "check out" procedure after guests leave, to make sure the trash is immediately taken out, and no food of any kind is present, wipe countertops, etc.

Not to mention - if he is leasing the whole building, he is then subleasing to the other floors.

The numbers look ok but that can vary GREATLY based on the ares, the age of the building, the age of the major mechanicals, how much work will be needed once a tenant moves out to make it rent read and other misc variables.

@Fareed Khamitov As @Chris Szepessy has mentioned above, one has to gain experience to be able to work in "war zones".

Thanks for the mention Daniel!

we live in the Jet age and to not partake in that to me personally is a big miss in many's life experience's.. 

One of them started at the age of 18 and is still selling today at age 40.

Is it out of your job, vacation fund, retirement money added to a 401k, taking care of aging parents....You determine what the goal is and the answer will become crystal clear.