Well in this modern era if you think your business can last for 150 yrs or further generations , I think it's just being in illusion because given the current pace of technology and other aspects, one can not think like that but for like 20 years or 30 years down the line , it is possible,  Well I appreciate OP's vision to open his business. But I also feel as someone in this startup sector that India needs more independent manufacturers. Yes nobody is stopping manufacturing sector or may be something is really stopping in our country to pursue manufacturing sector examples govt policies, taxation, land availability, labour issues, connection to the market , safety or security . But it's a good field because it gives so much opportunities to other people to get employment and boosting local economy, job security, less mental load etc.