The smartphone idea is a good one.

If you really don't care about losing the recorder, I would honestly just get something like this and get some really cheap lavs that don't sound totally awful to pair with them.

But really, if it were me, I would try my best to make sure no one walks off with my gear. That seems like such a waste of money, and wouldn't you lose the recordings too, since they are being recorded directly to the recorder?