Anyone have the rough idea about how much the grille gonna cost for a double storey house of 22 * 65 in Johor (Muar area)?

Intend to do for all exterior windows for 4 bathrooms (small size) and 4 bedrooms, and also 3 doors (back door (kitchen), door from master bedroom to balcony, and front double door)? Possible to set the budget below RM 4k?

What is the cheapest option (with reasonable security), normal range and best option? Your advise is much appreciated.

So far I only know got mild steel, wrought iron, stainless stell and aluminium. For my budget, think only can for the 1st 2 options.