Honestly,
You can do this yourself instead of paying a ‘consultant’ to do it. save yourself a few bob in the mix and put the money saved to something else your SMF needs. O’Connors has a free spreadsheet. I have copied the link from the internet. Anyone with a bit of nouse can fill in the blanks. Have a meeting. Discuss what needs to be done and how much you think it may cost. VOILA!!!
http://www.opr.com.au/assets/SinkingFundAssessmentProForma.xls