how do you advise home owners who want to replace their own windows? my labor is cheap so i can spend most of my budget on the units themselves. i need 8 units, for bedrooms. average size is 30hx50w. sliders. do i go down to menards/hd/lowes and buy whatever the window dept guy says is good? i want all new units. not inserts. custom made to my RO. should i consider a window maker who caters to homeowners? i am in mpls, mn.