Hi Kay and a big welcome to the forums.
I'm an Aussie, so it's good to send such a long distance greeting.
I do transfers, vinyl and rhinestone designs.
The only screenprinting I've done has been of the "get-someone-else-to-do-it-for-me" kind.
Especially for quantities 50+.
Not sure what you're experience is, but I'd say hang on to the screenprinting method also.
I'm actually thinking of branching into some of it myself, so as not to have to source it out.
I must say though, it's kind of nice to just sit back while someone else does all the work!!
(that's probably what my husband thinks most of the time around the house

LOL )
Anyway, you're bound to get lots and lots of great help and info. here.
This forum is incredibly good, and heaps of the members are always happy to help out and give great suggestions and support.
Enjoy the ride and blessing right back at'cha.