In a consulting and support business, the economics usually require a relatively low fixed overhead cost. You can build such a business around any existing piece of software. That you develop the software in-house doesn't change the nature of the business but it does make for a poor implementation of this business model.
Deliberately incurring a high fixed overhead (product development) in a well-understood business model where profitability is highly dependent on minimizing fixed costs is creating the conditions for failure. To make this work you can no longer survive by being merely average at executing the revenue side, you have to be exceptional at the revenue side and most people are not exceptional.
Success in this model requires two separate miracles instead of one. Good startup opportunities are single miracle companies, and you focus all of your attention on creating that miracle. Companies that require two miracles to be successful are poor investments because you now have to solve two hard problems that split focus.
Deliberately incurring a high fixed overhead (product development) in a well-understood business model where profitability is highly dependent on minimizing fixed costs is creating the conditions for failure. To make this work you can no longer survive by being merely average at executing the revenue side, you have to be exceptional at the revenue side and most people are not exceptional.
Success in this model requires two separate miracles instead of one. Good startup opportunities are single miracle companies, and you focus all of your attention on creating that miracle. Companies that require two miracles to be successful are poor investments because you now have to solve two hard problems that split focus.