Publish the criteria
Consistency is what makes it fair.
Because a decision made case by case cannot be shown to have been fair.
Fair housing law does not only prohibit intentional discrimination; it makes inconsistency itself a problem. A landlord who assesses applicants on impression, varying the threshold by who is asking, has no way to demonstrate the decision was lawful — and the applicant has no way to know what they were measured against.
Publishing the criteria fixes both ends. The applicant can decide whether to spend the fee, and the landlord can show the same test was applied every time. It is also simply more respectful of people's money than inviting applications nobody intends to approve.
The other line that should never be crossed is self-help eviction. Changing a lock, removing belongings or cutting a utility to force a tenant out is unlawful in Florida however much rent is owed, and landlords who do it convert a recoverable debt into their own liability. The court process exists precisely because the stakes are someone's home.
Consistency is what makes it fair.
With the notices the statute requires.
Self-help eviction is unlawful.
Viewings by appointment, and the criteria are published up front.