I believe that you may have problems with the training and the faa license. But punching holes in the sky after the bi-annual shouldn't be a problem.
I am currently tring to get one before i go just to cover myself. To be honest I think they will allow bi-annuals soon because they have a huge impact on GA flying in general to the US pilots. As for the training aspects i think it might take longer because they will want to have some sort of checks going about who you are etc.
I think if there are no ppl's in the circuit i should manage 2*3hr trips per day.
MJ