Re: pvc "lumber"
denise, some of it can be painted or stained. Some is 100% plastic, some is a plastic-and-sawdust mix. They've all got pros and cons and they are all "floppy" compared to the stiffness of wood.
Sometimes you can also get ipe decking, 5/8" thick, aka "ironwood" and if someone has a split bundle a couple of pieces would be fairly cheap. (Way cheaper than teak.)