Having a sales mentality would only get you far, if you have an understanding of the other aspect of business* Cash flow is different from sales and you can’t start a business without knowing how cash flow works*Focusing all your attention on Sales/Marketing can be very dangerous.

Yes you would make sales but you might not be in the market for long. #Consider new technologies and new markets.

Also sales does not equal cash. Cash is what you need to survive*Having a business plan is essential to measure viability( to know if it will survive in the real world) not capital.