Usually you split the costs when it's on the boundry line and you both pay for any repairs     Sometimes I will have the fence a few inches on my side to stop any argumentsjust last week I got a survey and posts are in and fence should be finished in the next two days it's on the line 

I cannot make money if I am replacing flooring on yearly basis in each unit.I would recommend you go with 16 or 17 inch tile. 

With some tenants, if you give them an inch, they will take a mile.

If the window is {partially} below grade the distance from window to the opposing side of the window well must be no less than 760mm (~30 inches). 

I think that they require a 16-17 inch height.

If it's big enough to cover the whole room and you layer it on top of some kind of double layer soundproofing that might help. 2 layers of 1/4 inch cork underlayment comes to mind.

I have seen many times that the tenant thinks that they will get a break every month, it's the classic give an inch they take a foot. 

It is a big investment, but you will have improved the property greatly, and enhanced it's value.And, ask him to do a cooling and heating load calculation to determine what size equipment you need. 

Unknown to us it said 9 birds were accepted by the management company and it did not stipulate what kind of birds they were although we were told verbally they were just two love birds which are about 5 to 6 inches long and birds that are in the apartment flying around are cockatoos about 14 to 18 inches.

Start with a multifunction painter's tool, a 2-inch flexible putty knife, and a 4-inch taping knife.One of the best get-you-out-of-a-jam all-around power tools that you can buy is a variable-speed oscillating tool, which is often called a multitool.