The fact he went ot Fox Symes tells me he has or did have credit issues?
Business saving can be taken into consideration by some lenders.
If you can give me the guts of the loan required Ill steer you to the correct lender.
To help me help you a couple of questions if I may
Your son....
Wants to purchase a house/ unit/ other? Postcode? Approx purchase price? Savings? First home buyer yes or no? Registered for GST? How long in current business and type of work? Does he have BAS,trading statements, can he get accountants letter, any of these will help? What amount can he put in as a deposit? Good credit or past credit issues? Explain if past issues Will he be renting the property out or living in it?
From the answers to questions aove I will be able to steer you.