It's more common these days to have non-traditional income that doesn't fall into the W-2 category. Many people work in what is referred to as the "gig economy," where income might come from a variety of freelance sources.
Are you the type of real estate investor that has an interest in a treasure hunt? A real estate investment strategy based on hard money is, at its core, a treasure hunt. There must be an underlying value, the "treasure," for a hard money opportunity to exist.
For most people, the mortgage payment is the biggest monthly expense. Whether you're facing retirement or still working, it would be nice to be free of this debt. Although you probably can't pay it off in one lump sum, it is possible to pay off your mortgage sooner than expected.