Did you ever have any doubt about weather this will work out or not?
After nearly a decade of doing this, the doubt never ends.
Rough times right now for sure.
Since you say you, "couldn't be happier", let that drive you to continue on.
Don't worry about what you can't control. The flow of Expediting is always changing.
You can go from slow to go go go in a heart beat. Try to judge how your doing longer term ie: Month to month over week to week or day by day.
Starting out new is never easy. You will be hit with the learning curve, it will level out but may take time as you gain experience. Still that may not be enough as many have failed.
Back in good times (many years ago), I did pretty good driving for a owner.
But those days are long gone, it was tough for drivers before all this 2020 mess. I couldn't image driving for a owner now. If I was in your shoes and wanted to continue with this...Do want you can to survive, stay out as much as possible, and work towards getting your own van.