Does the procedure for holding security deposits and advanced rent also apply to commercial rental or self-storage facilities?

No. Section 83.49 of the Florida Statutes applies to residential tenancies only. Commercial space and self-storage facilities are governed by general contract law and/or Florida Statute 83, Part I (Nonresidential tenancies) and Part III (Self-Storage Facilities). In fact, the provisions of the residential tenancies are generally more stringent for the landlord than those for commercial space or self-storage facilities. Landlord of these types of rental space must refer to the contract between the parties and the appropriate section of the Statute.