I also agree. 90 or 120 days would be a better plan. I'd also add in working with her and the horse before you send him home. Nothing worse than getting one going good only to send it home and have it undone and then run the chance of it being "your fault."
As general rule, I won't take any for only 30 days. Exceptions in the past have only been for close friends, just doing the starting for them to finish or tune ups on show horses that need a finesse reminder.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.