Degrees don't. 

Roofers come in varying degrees of expertise.  

They wont.Primary residence holders can live in and enjoy the use of unpermitted work, self accepting known risks associated with it.  

It's hot heck at the moment around 100 degrees, but I'm hoping it'll be worth the investment come winter time.

For whatever reason, they accepted my first low offer to scoop them all up.

I added an amendment to the current lease and I increased the security deposit and rent (not by much though) and told the tenants that I will not be accepting the wife and child when they move here in 4-6 months.

In Oregon here in my new home project.. its a negotiation selling agent writes in their fee and we can accept or counter. 

Some things to be mindful of are the added costs of having to facilitate delivery and acceptance of the windows if you are purchasing them yourself rather than go through a contractor who both supplies and installs the windows.

Not to mention, they are not legally able to perform any of the duties or services they accept payments for.

Did you get an accepted bid?