Prefabricated Houses

we are interested in your products,
we have a housing project (multiple units) and we need your best offer for pilot building as follows:
area 250m2
two floors
3 bath rooms
open area for living, dinning and kitchen.
location at ashkelon - israel
please break down your price as follows:
1- steel
2- external wall (cement board or magnesium as options)
3- roof (cement tiles or clay as options)
4- deck panels for floors