You might have one or two mets which are amenable to SABR radiotherapy with a curative intent. A PSMA PET scan will be required to identify if that's the case (although they might start with a bone scan and/or abdominal CT scan as those are generally available much faster). Any more than a couple of mets and they're unlikely to offer a curative treatment.
HT is the primary treatment for advanced prostate cancer. If you refuse it, you are in effect refusing treatment. There are other treatments which are added on, but I doubt would be offered (or effective) without the HT.
You can always try it and see how you get on. You probably should do that before deciding to refuse treatment, because it might not impact you as badly as you're imagining.
What has been done by a small number of people is to defer HT until cancer symptoms show up, or there's imminent risk of something major or irrecoverable such as metastatic spinal cord compression.
Another option would be to use intermittent hormone therapy, where you start with HT and when your PSA has been very low for a while, you take a holiday (break from HT), and go back on to HT when your PSA reaches a level your oncologist decides (such as 10, perhaps). This works well for those whose PSA rises only slowly and they spend more time off HT than on it, but you do need an initial long burst to start with.
You might also look in to BAT (Bipolar Androgen Therapy), where you stay on HT medication all the time, but part of the time you are given Testosterone, so your body alternates between having and not having Testosterone. (The switching is done more frequently than is possible by coming on and off HT medications.) I haven't seen good outcomes for this, but I've only seen it tried when men have already become castrate resistant, and I suspect that if it works at all, it's probably more effective much earlier on.