I honestly would not quarantine in the same room. That defeats the purpose of quarantine. Many illnesses and even mite nymphs are airborne. I know you said the snakes are mite free, but I was just putting it out there.
You have to use totally different set of tools and supplies. You don't want to cross contaminate tools such as tongs, water dishes, scale, and even feeders. You want to work with your established collection before you work with the quarantined animal. That way you can't expose that new animal to the residents.
And I believe 30 days is much too short for a Q-period. I do mine for a minimum of 6 months. Some members even do a full year quarantine. Illnesses and disease can lay dormant for months before becoming active. Much longer than 30 days....