Hi SAFX, my OH was diagnosed at a similar level and I understand the worry. What will be most important is how well your husband responds to the hormone treatment. If his PSA comes down really quickly in a month or two from starting the hormone treatment then that is good news. If the PSA is slower to come down then it is more serious and could indicate some hormone resistant cancer cells are present. Three months of hormone treatment or more before radical treatment is usual. My OH had his final diagnosis March 2023 and started radiotherapy in May 2023. After 6 months of hormone treatment his PSA was 23 down from 264, which was not good. You can look at my profile for more detail of his treatment and his response.
Good luck and keep asking questions, the support in this community is really helpful.