Replacing Windows in Multifamily Property

[Aaron Zimmerman]

I'm looking to update the windows in my property for all units if possible. In total, I counted approximately 30 windows that would need to get replaced, with many of them not being the same sizes. I also want them to be installed as well. A couple questions based off of this:

1. What type of windows are generally best for insulation that won't break the bank? I'm also looking to replace the trim around the windows- many of them being wood. 

2. What are some reputable companies that you've worked with that have done a good job with the install? What does this process look like?

Thank you very much for your responses!