Why don’t I just hire my own full-time CFO?
If your company can afford to - then great.  However, keep in mind that in a small to mid-sized market a good CFO’s loaded compensations can easily be upwards of $120 an hour or $250,000 per year before equity or bonuses.  Add in another 25% to 50% for equity and bonus incentives that many companies give their CFO’s and you will be paying out a very hefty sum of money.  FYI: The average length of employment for a full-time CFO is now down to 2.5 years.  Searches, placement cost and fees will be expensive each time you need to replace the CFO.  In many cases having a CFO on retainer may be the most cost-effective use of the company’s money.  It would cut the cost of having a full-time CFO on staff by as much as 80% a year still getting the expertise needed for the company.