Can I use......

With a 30w panel it should not be a problem. Your approach is a good one, don't spend a lot of money until you're sure of what you're buying.

My first off-grid PV system started with about a dozen used UPS batteries.  It worked well for awhile.  As the batteries aged, and failed one by one, it was a hastle to sort out the good from the bad.  A couple of marine deep cycle batteries from Wal-Mart made life a lot simpler.

Also, it seems that you're planning to mix batteries of different capacities as well.  That is not recommended.  Still, if I were to start over again, I would probably do what you're planning to do. 

And since you're starting off small, I'm wondering why you've chosen a $129 charge controller when you could get by much cheaper.  I suppose it's because you want the display, right?  I decided to go with Morningstar, with display, and I love it.

Steve,

I would like to suggest that you connect all of your batteries to positive and negative bus-bars.  That way it will be easy to disconnect batteries one by one for testing and troubleshooting purposes.  I bought my bus-bars from my local hardware store.  They are actually the grounding bars that are used inside breaker boxes.

John