Dear Haroon,
Please find below answer to your queries;
1- How good it is to build and sale a house or to become an investor?
Its really good untill you maintain high quality standards rather only making profits. With good quality construction, your customers will be limited at 1st but on long term your name will be an quality symbol.
2- What are the profit margin nowadays, I mean before COVID-19 epidemic?
Depends upon area and quality of construction. In 5 marls usually 1.2 to 1.6 MM PKR
3- What could be the estimate bifurcation list of the material. If someone had made it then he/she can share.
Share ur mail ID, will send excel based material calculation tools.
4- What could be the approximate time span for a 5 marla if budget is not a constrain.
5 Months Min and 6 Months Max
5- What could be the approximate time span for a 5 marla house to sale.
Can be sold even on day 1 once house os ready. Depends upon multiple factors like quality, realistic demand, country economic situation, house location and lot more........ Sometimes it may even tak 1 year to sold, so no definite words.