Two highly ironic things about your post:
St. Francis was founder of a religious order which takes a vow of poverty.
St. Francis was an active proponent of the notion of "Saved by grace, and by grace alone." The Catholic position is that faith and works are both fruits of a salvation which occurs through grace alone. I believe one of the solas you refer to is "faith alone."
Let's get it right. The "sola fide" of the Reformation was that faith is the alone instrument of our salvation. Jesus Christ is the object of that faith. We are saved by grace alone through faith alone. Our "good works" contribute nothing to our salvation, they merely affirm our salvation.
The RC position is that the instrument of salvation is faith plus works.