Improvements to Real Property; Authorizing a program administrator to offer a program for financing qualifying improvements for residential property when authorized by a county or municipality; authorizing a program administrator to levy non-ad valorem assessments for a certain purpose; providing for compensation for tax collectors for actual costs incurred to collect non-ad valorem assessments; requiring certain financing agreement and contract provisions for change orders under certain circumstances; requiring a county or municipality to establish or approve a process for the registration of a qualifying improvement contractor to install qualifying improvements, etc.