- Could the seller be trying to hide potential major issues in the house by leaving no room for inspection results or could it be just ensuring not to disturb the tenant?

@Dave Kush You can send them a certified letter that it is no longer a smoking building and you would have to use an existing term like quiet enjoyment or not disturbing others to enforce. 

Within two months, they were causing disturbances, fighting with neighbors, and creating an unsafe environment for other tenants.

One other disturbing thing, they send me a spreadsheet to dump my data in, then 2 weeks later we can use it. 2 Weeks, so we just stop operations for 2 weeks?

The seller's basement was dug up, they tunneled under most of the front lawn, the sidewalk, curb and road were partially disturbed.

It took us 3 months to remove an illegal mentally disturbed tenant from an apartment who was sub-letting from one of the tenants. 

Will not disturb you guys here with all the detailed information, but most of the time we then step in and organize this for them.

The AC was not included on the lease so before I had this disturbing conversation with tenant he installed 8,000 BTU AC unit that was not enough to keep the place cool.As much as I appreciate your advices I think that getting property manager is taking easy route and I like I mentioned I am pretty new to this and want to learn as much as I can and sometimes it is just not pretty and easy but I still think its worth to managing the property on my own so that if I ever end up getting property manager I know what to expect of them and how to manage them!

Dan, you might want to check out the Short Term Rental forum here on Bigger Pockets too.Also, in the past week, there is some disturbing news from the city council in OC. 

So the rent is paid, but he is disturbing the neighbors, or stealing things, or smoking cigarettes indoors or something.