I don't know about the Rebel XS. Not sure how old or good it is. But, I have a Rebel T5i and it compares pretty well (for the low cost) to my 6D and 7Dii.
I am also an owner of several business, and, like you, had no money at your age.
So... as a businessman and a photographer, I would suggest you not spend money on more equipment that mostly just upgrades what you've got. That's a fatal decision for a lot of businesses. If you can't make money with what you've got, you're not gonna make it with a few more megapixels on your sensor, or bokeh in your background. BUT, a LOT of businesses have gone belly up because they didn't have enough working capital to get past the start up phase.
If there is stuff you really, really need (Lightroom, back drops, flash) that you don't have, maybe cautiously invest there, but only cautiously.
Economy is on a razor's edge right now. And a lot of great shots have been shot with iPhones and shot 100 years ago with crap equipment (by today's standards). You can take great, creative, awe inspiring photos with what you've got. But, not if you're working at McDonald's because you're broke.
Just my $0.02.