I assume that daughter is older than brother, emancipated, etc. Since son is 17, you are still of working age and holding a job. You probably don't have much in the way of savings and are joint owner of an automobile and the house with the usual personal property.
Granted that life is miserable living in a hotel, but it sounds as if you made the best choice under the circumstances.
Next step: Find an attorney who has reputation for being mean as a junk yard dog! Don't let this go another day! Retain him and start divorce proceedings. You may not want a divorce, but it sounds as if you already have one in reality!
Next step: Wean your puppy! He has been sucking up dad's food, etc, far too long for his own good. How much do I want to bet that he has never had a job, never had to do chores around the house, has pretty much been momma's fair-haired boy? Not much! That's a slam dunk!
The divorce action may make your wife wake up and try to reconcile. If she's serious, then your lawyer goes to work for you. Rules: 1. The guitar is never played or even tuned whilst you are in the home. 2. Any bad language or name-calling and jr. is out on the street [FIRST TIME! No bones about it.] Suggest that he study the 5th Commandment!
3. You do the work, you pay the bills, you control the TV. [Be nice, though, and share!]
You'll hear a lot of whining about male chauvinistic attitude, etc. Blow it off! The Golden Rule: He who has the gold makes the rules.
Caveat: Get the wrong attorney and they will have your gold!