Hello Rezwan,

Thank you for your feedback and for your questions.

In answer to your question about how to create a financial model for a business...You are correct that most of the variables do NOT remain constant, even as a percentage of sales. What you need is a good book on financial valuation and there are literally dozens. To me, the best book on this subject for a layperson is Brigham and Gapenski's book on corporate finance that is fully referenced above in this article's question stream. The section on valuing a project is what you want to focus on. Take a look at some of the other books I recommended.

Regression analysis can be used, but in my experience it is too mechanical in its approach to predicting the future.

Regarding investment banks and financial institutions giving value to Chartered Accountants. Sure, of course; many of them do. The investment company where I used to work hired an analyst specifically because of her accounting expertise. You should ensure that you understand business accounting very well, and most importantly financial statement analysis. This is the key skill for investors.

Best wishes for success!

Jason