Just move into the spare room permanently. Why bother starting in a bed you know you won’t stay in? It’s not like your entire marriage will crash and burn without spending 8 hours a night unconscious next to each other. I never got this obsession with having a ‘marital bed’.
CPAP machine is what a very heavy snorer like your DH needs . Look up sleep apnoea and the side effects (including heart problems and increase risk of heart attacks). Show it to your dp and tell him to go to his GP. He may need to be insistent as it can take time to get help. Maybe record him so he can take it to the GP
CPAP stands for continuous positive airway pressure and is used for people who cannot maintain their airway when they are asleep. For example in cases of sleep apnoea.
OH started to snore a few years ago, and it got louder and louder. He then stopped breathing while he was asleep. After being assessed by the sleep clinic he was issued with a CPAP machine, and now he no longer snores.
Usually snoring is associated with being over weight, but not in OH's case.
Another one here who has had seoerate beds for 4 years now and has experienced absolutely no decline in our relationship, if anything its better as I'm not constantly pissed off that he's kept me awake and he's not waking feeling guilty every morning.