The cost of construction of house corelated with plan of the building and specifications used during construction. As you want tentative cost , so it is possible to complete the f.fllor 15-18 lacs.
As about time frame it will depend upon the quantum of labor employed, if sufficent labor employed than the house can be completed within 40 days. If you want to know about construction than visit the website gharexpert.com where lot of articles regarding construction, interior etc some link below
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