A fish farm or fish based business could easily generate a good amount of money. Even if you are not a traditional fish farmer, you could easily make a steady income from your home, using aquaculture fish farming techniques. Fish is increasingly becoming popular as a source of protein, and it could easily feed a small family with very little cost or overheads. There are also other benefits of fish farming. You could use the waste from your kitchen to feed your fish, and if you have a kitchen garden, you could also use the waste from your fish as fertilizer for your kitchen garden.
There’s no need to be an artist, just an expert in some form of art. Visit galleries. Get on their email lists, and go to their parties. Get to know their clients. Gallery owners will love you, even recommend your services, because you’ll be telling people to buy art from them. You don’t have to own any inventory. It’s pure consulting. There is almost no overhead cost for a business like this. It’s really about having a passion for art and a knack for earning people’s trust. And it’s fun!
Market your talents to building contractors. People purchasing new homes can often be overwhelmed with the choices and possibilities in home decorating. Design some questionnaires for each major element and each major room in the house. Find out how the homeowner will use the home--are there children? Pets? Does the woman of the house wear high heels? Do the home's residents neglect to remove shoes? How will each room be used? Where might task lighting and ambient lighting be most appropriate?