Side comment, but perhaps an important one:<p>"it is generating revenue & profit, a couple of hundreds a month. Enough for me to cover my hosting expensives, and working less hours at my day job."<p>It is generating revenue, it is <i>not</i> generating profit. This may seem like a subtle point, but it really isn't. Take the amount of money you make in your 'day' job, add in all the benefits your day job has as well (paid vacation? health care? life insurance?)<p>You mentioned your wife doesn't want to work at this business, so treat it like a one-person shop. Next you've got a hosting service, do you host on a virtual host? or do you have your own equipment? One of the nice things about things like EC2 and their ilk is that it aggregates a lot of operational costs that you can then consider in bulk (no need to depreciate equipment for example). Presumably you have your own computer (or computers) that you do development on, those you should depreciate because you will replace them as needed.<p>Take all the money you make from this service, and put that on top. That is your 'top line' revenue. Now take all of these costs operational (hosting), local equipment, your salary, your benefits and that becomes your 'burn' rate or recurring expense. Subtract them from the top line. The ratio of that number (the difference between revenue and cost) and your total revenue is your gross margin. Obviously if its negative you don't have any gross margin.<p>But if it is negative (and I suspect it will be) work backwards and make revenue a variable 'x' and your gross margin say "20%" Solving for x says your revenue has to be 20% higher than the sum of your costs to maintain a gross margin of 20%.<p>Now look at your customers, if you have N customers and you charge them x/N Euros per year, will they still use your service? If the answer is "no" then work that one backwards as well, if your N customers are too few, for what n will the price per n be low enough to meet your revenue and margin goal of 20%?<p>Lets say you figure out that you need another 1000 customers to meet your goals, do a sanity check and ask "Is there really a thousand additional people who might use my service?" If so then you need to reach them, so try to figure out what it will cost to "talk" to them (this takes various forms, going to a trade show where likely customers would go, advertising in a magazine or on a web site where likely customers would be reading/visiting Etc.) How many do you have to talk to before one signs up? One for one? One out of ten? out of twenty?<p>Anyway, you get the point. Running it as a business is very different than running it as a hobby. I was trying to give you a sense of what you might think about in your question "What next?" to see if you wanted to make your hobby into a business. This can be a winning strategy, if the business is sound, because you already you know doing it is fun (since you started doing it with no expectation of return). Of course you may also find that trying to make a viable business out of it takes all the fun out, and that would be a bad thing.