When people planning to start any business they prefer the business in which they are expert or have great knowledge, like carpenter start a furniture business, a barber start a barber shop, a account start charterer accountant office etc. but I think the person who don't have knowledge about that profession in that only he can do better business. As he more concentrate on business expansion and its running other than to increase expertise in that product only. He can hire expert person and manage productivity. Many successful business person follow the same rule other than taking whole control of production. Yes, he can monitor and suggest any loop hole and that also much to make any business successful.
The global truth is that selling and marking is main key of any business. If you are not have much expertise in your production but you have great command on selling your product definitely can do better business other than the well qualified competitor of same product.
As we know many backer shop can cook well pizza than McDonald but still McDonald doing great business globally and has great revenue than those who has well expertise in making pizza.
Selling of your product will not be big deal if we find out target audience, their needs, their expectation and demand. Once you find out these details lets concentrate on how to convince them to buy your product or add such stimulation that your product automatically come in their mind first. Advertising can play main role in that but I would suggest add your product in audience habits, like by taking their fear factor in granted or any current generation need. Many company use doctor advice kind of thing and in many cases it successful.
About marketing, online marketing can play main role like non-sale oriented blog writing which create more interest of audience and people like to read them, by this process you can advertise your product indirectly if you make direct appeal it will become boar idea and people don't like it. make your story systematically well plan.
I have read a book where given important of asset where we can invest and get money back. About my business (https://genieee.com/) as mobile entertainment market is in boom now days specially mobiles games. we can consider this also an option. From this business we can earn money from advertisement or in game purchases.
Choosing business which increase your revenue is totally depend on how you think about it. If you want to become expertise in all area of business your business will not run as smooth as it should be.
Better you concentrate on any one area and let others do their work.
