go to an animal shelter or call your local humane society and find a dog or cat that comes from an environment that will work with your family (housebroken, doesn't chew stuff, not aggressive, good with children, etc)Then you assign the sleeping arrangments for the new family member to the new racecar bed with your son.
A little gentle encouragment here. You have to start thinking of setting the ground rules and expecting them to be followed as the parents. Yes it feels awful sometimes but these are the struggles in life that are paramount to adhere to and swallow because if you don't establish the line of authority NOW, you can kiss it goodbye for anything else as he gets older. And it gets more difficult but they realize they got by with something by crying or temper tantrums etc.
You can ask why he won't sleep in his lovely new bedroom, and WAIT and listen and HEAR what he says. Wait a moment to digest his anwser and then respond with, I see, well you are getting big now and all the things you want to do as a big boy come with other things that are part of growing up, that includes sleeping in your own room. If you are not big enough to do that yet then you are not big enough to do.... the computer, ride a bike etc. Whatever he is learning to do. The theory is as they grow, they have to accept ALL the parts of the age group they are entering, they can not be selective. Like a teenager who thinks they are ready to move out on their own, the answer is fine, but you do so on your own. It doesn't come with the family car, or the furniture from the house or money from mom and dad. Why? because you are teaching them nothing if you don't teach them the whole package of each stage in life. And when they get out there on their own there are no breaks and the strugle is tremendous and that's usually when most young people suffer.
Yes they will be angry with you (for a while) but YOU are the teacher, you are the parent and you cannot turn the clock back to re-teach. The best time to learn each phase in life is at the moment it takes place and no sugar coating. That way YOU are there teaching the correct way and guiding. You will send out a very capable person into the world instead of someone who is dependant and needy.
Put a night ligth in the room, leave a radio playing soft classic music, (no TV)and tell him he will be fine.
You also should consider putting him to bed before you and your husband retire so this doesn't have to even be an issue. Then the issue is that it is HIS bed time and mommy and daddy will go to bed after thier work is done. End of story. Be persistant and firm and loving, it's a matter of who has more tenacity. You'll do fine. JF