I have a client wanting to be able to watch the footage as it was being recorded and I wasn't sure what was the easiest/most cost-efficient way of doing this.

I am currently using a Canon XH-A1. I would like for the client to be able to watch what I'm recording but not have to be right up on top of the camera while doing it. We'll be shooting a lot of broll so we'll be moving around a good bit. Most shots won't be on a tripod or this would be an easy fix.

Any suggestions?

Anybody have any solutions?

not totally familar with that camera but most every camera I have ever used has composite out, firewire, some have S out, some have hdmi, some have component out. Run a cable from whatever video out you have to a monitor and that should do it.
Again not sure about the Canon, you might have to go into a menu to set the video out.

If you don't want a cable hanging out, there are wireless video adapters, but they tend to be fairly expensive.