There are various scholarship available to assist in attending a Catholic school.  These scholarships are income based and for students with certain disabilities. 

The scholarships currently being offered in the State of Florida are:
Florida Tax Credit Scholarship, Family Empowerment Scholarship (EO), McKay Scholarship and FES-UA (formerly Gardiner Scholarship).  See the links below for more details:

Step Up for Students 

AAA Scholarships 

Florida School Choice Office