smsf advice, page-26

Costs are about 600 to 800 dollars

A very conservative cash deposti gives u about 5 to 6 %
Tlstra and banks give around 8 % FF so in reality the % return for these is higher

So expext 10 % return I think

To just cover expenses ($800) means $8000 invested

Of course you want more than covering expenses so I think $50 000 is a good start point

10 % around $5000 - $800 exp = about $4000 return