<human>: Can you condense the text into three sentences or less?

A good friend's father owns a small family business.  He currently runs it together with his son - they have been working there together since the son was 22 (about 12 years ago).  It has been in the family for 4 generations now, and they wish to keep it that way. 

He has two other children (daughters), neither of whom work actively in the business.  

He is planning on retiring in the next few years, and leaving the operations of the business in the hands of the son.  

However, the great bulk of his assets are tied up in the business.  Ideally, he would like to sell the business to his son and retire with the money he gets from the sale.  

Unfortunately, if they were to do this it would leave the two daughters out of the deal.  And he sees the business as part of their inheritance - it feels partially unfair to leave it/sell it entirely to the son.  

They have not yet gone to see any inheritance specialists regarding this.  They tend to see it as something that they can work out themselves, as a family.  

Do you have any suggestions as to how they should go about this inheritance/sale/split?  The important things in any case are:  

1. Keeping the business intact and running (it is healthy and profitable, but not enormously so)
2. Making sure that everyone involved feels as if it was a fair deal
3. If possible, providing the parents (current owners of the business) with some money for retirement
<bot>: Parents helped build a successful business.  How to split it amongst 3 siblings when only 1 will be actively working there?