Talador.  Your suggestions are workable and not far off some of the ideas I am looking at.  Single foil under the ww hull to reduce drag.  Foils to the lee of the lee hull at the crossbeam.  However I will be trying canard steering.  Th HP's basically go this way anyhow with the existing set up.  I have a simple engineering solution for the reversible canard.  You'd need a 5m arc to clear the bow for the cross beam foil however and I'm not going that long.  I'm simply not going to fly the craft to around 3m above the water.  Foils can be set up to rotate up at an off angle.  Cross beam foils would only be deployed one at a time, balancing the canard foil.  This creates complexity with raising and lowering.
I'm keen on only 2 lee foils: reversible steering canards.  Whether this is workable I can't say for sure, but its well documented that the main foil in a canard system should be behind the centre of mass and centre of effort.  In a cat rigged proa the C of E is a loong way back, so it may work ok.
Hydraulics and automation are ideas that I haven't ruled in or out, though lean toward ruling in in at least one application.  I want to keep things simple.  Yet having past experience designing and CNC automating hydraulic machinery, I'm aware that simplicity of operation isn't directly related to simplicity of design. 
I shan't be providing anymore detail at the moment.  I want to run an engineering analysis first.  Furthermore, I don't have much spare time.  Working evenings and building by day leaves little time to play.  I'm not rushing this build, but I do want to get back to my academic research (before they lose patience with my deferral).
David - DrawnOnward