They aren't hardy to my area but when I get better at this I'll probably try one. At the least I can mimic it with another species.
Unless you have winter storage in a cold greenhouse, you are very unlikely to be able to keep Southern Live oak (quercus virginiana) alive where you are. I have a close relative of the the sothern species--quercus fusiformis--as bonsai here in Zone 7 Virginia. It is more cold hardy that q. V., but I have to store it in a cold greenhouse from the end of November until mid-May or so.
It could survive without that treatment, but it wouldn't develop as quickly. Additionally, the weather has been very unreliable for the last five years or so, with very early warm ups followed by deep freezes. That kind of thing would probably have killed it.
I would suggest substituting boxwood. It can make quite convincing live oak images and is vastly more cold hardy than any live oak would be in your climate.
First pic is of my actual live oak (collected near Austin 25 years ago), second is of a Kingsville boxwood style as a Texas live oak.