It wouldn't suprise me if the ssr lasted for a long time, even in a constant on state. It sounds like your set up would work well, and even if the relay failed it would be somewhat obvious what the problem is. The only thing that my setup would be able to offer is that you could remotely see the state of the power, as well as see how much amperage is being drawn. However, if all that is needed is the ability to detect the on/off state of the power you could hook the wireless doorbell chime to an arduino so that when it went "bing" it sent a pulse to one of the digital pins of the arduino and then updated the state to a website such as xively.
For me knowing the power consumption for some things was important, this way at least I would be prepared when I got a large electric bill in the mail.
I have several of the extra shields sitting around, I just need to order the DHT22's for them. If you are interested in trying it out let me know.
Sorry it has taken so long for me to reply I have been kind of busy here. I just uploaded a short video to my youtube. This will hopefully be a little more descriptive. I should have some more videos and pictures up soon let me know if you think this might be useful, or if you have any ideas on what would be more useful.
Here is the link https://www.youtube.com/watch?v=VhWnQGCwB7s&feature=youtu.be
and you can also find it on my hackaday page.
I will post some pictures and a video soon on the hackaday site. I will let you know when I have them up.