Would you replace double pane aluminum windows on a flip?

[Nancy Zhao]

Here's my dilemma. The property is built on the side of a hill with panoramic views of below. The windows are 20 years old and aluminum but are actually double pane, and hasn't been taken care of in their entire lifespan. Most of the windows still seem to be intact but have a lot of cosmetic issues and the style is also quite outdated. 

Replacing all the windows with the ugly arch design intact will cost $1400 per window + labor(second and third story installs, maybe 200 per window). If instead I redo the window frames and restucco/drywall so the window openings are a standard a rectangular shape, the cost of each window falls dramatically to only $500. There's half a dozen of these large arch windows, plus regular rectangular windows, plus 3 large patio doors.  I'd be looking at $10k to replace all the windows and patio doors, or nearly $15k if I keep the arch design.

The other alternative is of course to simply not replacing the windows, unfortunately one of the main selling points of the house are the views and the ugly aluminum windows get in the way of that.

The property itself is one of the largest in the neighborhood(3500 sqft), the closest comp is considerably smaller(2800 sqft) and not freshly renovated sold for nearly $1m last year. The lot isn't quite the best, but I think the ARV is in the 1-1.05m region. This puts me firmly at the top of the range unless I go out a bit further and compare with more upscale homes selling for 1.2m+. My margin here after selling/holding costs is roughly ~200k, of which I expect to spend 60k on renovations excluding the window replacement.

What do you guys think? Here's a picture of what the windows look like, sorry for the poor contrast on my camera. Any advice would be greatly appreciated, thanks!