I'm fine with all the primary beneficiaries (just myself and wife) providing guarantees to the bank.  I am more concerned about excluding my wife from becoming a director and the duties/responsibilities that come with that role AND still finding a bank to loan to the trustee company.   

Just another thing, can I approach the conventional banks and credit unions for an investment home loan easily enough with this setup or is this likely to be put in the too hard basket?  Maybe it's time we consult a competent broker.  

Thanks everyone for your comments