Finding/making inexpensive rental signs?

[Mark Hu]

I've had my rental signs stolen frequently lately, and I was wondering if anyone knows how to make or buy them cheaply. The ones from the local hardware store are 7 to 10 dollars a pop and it is getting to be a drag buying them all the time.

Also does anyone know how to hang the signs on vinyl siding without drilling holes in the siding and creating potential water leaks?