My husband was also very loud with his snoring. He had a severely deviated nasal septum. He has since had surgery to correct that and is much better. Not to say that he never snores but it is better.
Also, if your husband has a glass of wine or beer at night, have him skip that and see if it helps. Alcohol is notorious for relaxing the soft palate and worsening snoring. If he is overweight, he needs to lose wt. Side sleeping instead of back sleeping is also useful.
I would not recommend getting a used medical device on E-Bay and using it without a prescription. CPAP machines are not something to mess around with.
Congratulations on the new baby!