This is not in anyway advise but I guess you may want to consider my following comments:
a. I guess I am slightly confused by the two statements - 1. "set up a trust fund structure" 2. "with... perhaps a company as beneficiaries"
b. Are you planning to run a stapled structure?
c. Have you considered the issue of the trustee of the fund and the trust deed for the fund?
d. The ability to pay out dividends to yourself seems to imply a company structure and dividends can only be paid out from accounting profit.
I somehow feel getting a tax expert would help you immensely in optimising your tax structure as there are many implicative tax avoidance issues you need to consider.
