Window installation advice needed on live in flip

[Ida Powers]

I am doing my first live-in flip and all the windows in the house need replaced. I've received 5 quotes now but there all from the bigger name brands and the price is high. I need advice. What do people here on BP do? Do you buy the windows and find a contractor to install them? If so, how do you go about finding a contractor? 

[Ray Fisher]

Replaced windows in three houses, took quotes, hired contractors, have replaced a few by myself after watching the professionals.  basically, they used jenweld from lowes double hung, double pane.  Found that out when I had a broke pane. looked for the replacement, called jenweld, they told me what to look for in the corner of the window, the sticker on the window and sent me the replacement.  every time I hire a contractor,   I get an education, as we all know a good education is expensive sometimes.