Is $5,590 to replace 5 Simonton double hung vinyl windows a fair price?

This option is for the replacement of 22 windows with vinyl windows. The quote is for Vistamark brand windows, which is a Texas local window supplier. It is understood that the replacement will involve replacing the entire old aluminum frames.

This quote is for replacing approximately 20 existing windows in the entire house. The existing windows have wooden frames and trim, are sealed with paint and caulk, have trim damage, old locks, and half do not open. - New Windows: Aspect AP500 vinyl windows - Scope: Replacement of approximately 20 windows (whole house) - Warranty: Lifetime warranty included - Discount: Includes a 20% discount for doing the whole house at once (list price was $25,000)

This quote includes the windows, materials, labor, tax, and a discount for the replacement of 49 windows.The work involves: - Removal and disposal of old windows - Replacement of any rotten wood around the exterior of the window frame - Cladding exterior trim of windows using G8 aluminum and caulk - Installation of new custom WHITE Mezzo Alside windows - Glass Specifications: 1" DBL strength glass, Climatech low E glass, argon gas - Insulation: Foam wrapped - Screens: 1/2 screens - Warranty: Lifetime Transferable Warranty From Alside - Window Types and Quantities: - 24 double hung windows - 5 large double hung windows - 17 larger double hung windows - 3 larger + larger picture windows - Additional Features: Some contoured grids included