Orange Pippin Forum Board

I have a small courtyard garden that I would like to plant two espalier apple trees in. The walls are about 7 foot tall, so I was think that 4 tier ones would be best.

Is it better to plant something now or wait until November? We can only see 2 and 3 tier container grown ones. Are there more available later in the year? Or would it be better to get a 2 or 3 tier and grown another tier ourselves?

Thoughts?

Mike