Land Wanted

I have a son and 2 grandsons in Austin. The boys are 13 and 11 years old. My son is looking for an acreage within one and one half hours from North Austin. I don't know whats out there or what market ptices are or even if what he wants is possible. He has $150,000 to spend and want raw land he can take his boys to and camp, shoot guns and ideally hunt. Can anyone help?

Thanks guys