I'd be grateful for any opinions or advice regarding moving a Rowan, 20yr old and around 3m tall.     It has limited root spread on the house side (1m), as initially planted close to a small retaining wall.     There is a drain to be laid more or less under the tree so it'll be gone unless I can move it, and I have 2 weeks to work with.   What would be the best approach, or is it too short a time frame to attempt?