Internets, I Need Advice

All swirling feelings aside, I pretty much just ruined Kyd's birthday and I clearly need advice. Just know that I may take it or leave it. After all, we must always consider that advice is often given by people who don't have to deal with the consequences of their advice. 

So, here's the background (this will be long). Kyd started being "in trouble" in middle school. What I didn't know then was that he had already started using drugs. As he got older, the trouble kept getting bigger and nothing I said, or anyone else (professional and non-professional) said made a difference. Somewhere in there Kyd also started drinking and did a stint in rehab and AA, but soon dropped sobriety not believing he was an alcoholic. A year and a half ago we were at the tail-end of a series of drunken, late night episodes, each episode more dramatic and terrifying than the last. Lexie and I were honestly beginning to fear for our safety. 

I suggested a return to AA which he refused and in light of that, and his refusal generally to stop drinking, I set a firm boundary that if he came home drunk again he would have to move out. Just a few weeks later, he came home falling-down drunk and after he slept it off and sobered up I sat him down to enforce the boundary. 

He spent the next several weeks couch-hopping and seething with resentment towards me. Finally he landed a living situation with a new best friend who took him in rent-free until he got a job. Kyd spent the next several months (8-10?) without much effort to actually get a job (as far as I can tell) and continued to live rent-free with a small group of roommates, all of whom worked. Meanwhile, he returned home every couple of months for a few days so I could drive him to court so his probation for a DUI could be reviewed. The court was becoming increasingly impatient with Kyd's lack of employment, and therefore inability to pay court fees or restitution. 

A couple of months ago Kyd was here for a court appointment and when it was time for him to go home he informed me that they were all being evicted because his roommates hadn't paid the rent. He was more or less informing me that he was staying with us until his girlfriend graduated (June) at which time the two of them had a roommate situation lined up that they could afford. I was able to convince Lexie and Roi to let Kyd stay and that it would be temporary.

It is now July and that living situation has fallen through and Kyd is expecting to continue to live with us. Meanwhile he has not consistently done the one chore he was assigned (the dishes), did land a job but it doesn't pay enough to live independently, and has stopped looking for another job. He sleeps all day until it's time for work, uses my laptop without asking, uses and takes whatever he likes, and gets a ride to work every day but never offers to chip in for gas. He also makes a mess and when asked to pick up after himself cops an attitude and picks up only a few things. He flat out refuses to pick anything up if it isn't his. 

In other words, he's acting kind of like an entitled brat. 

Roi is growing impatient with the situation and we don't have a room for Kyd so he sleeps on the couch and generally occupies the living room. 

As I said in an earlier post, I get that the math doesn't add up and it's really quite impossible for Kyd to live on his own with his current income. So I talked with Roi and he agreed that if Kyd contributes a fair amount to rent he can stay. 

So, when I proposed this idea to Kyd, who was feeling cranky and pressured about having to move out, he said to me, "I'm not going to pay fucking rent to sleep on the couch". He wants us to convert one of the offices (Roi's business is here) into a room, AND he will do only HIS dishes. OR, if he has to pay rent, Lexie must pay equal rent too. 

I explained that Lexie has one more year before she transfers to a 4 year college, but if she were to drop out of school she would have to pay rent. Also that she does chores, has to contribute to the cost of the car she drives, and pay for gas that is not school-related. And finally, that she understands she must continue to progress forward and contribute to the household without attitude. 

He feels he is being treated unfairly. I feel he is acting like an insufferable brat, and I am FRUSTRATED that every attempt to make this a workable situation is met by contempt from him. I don't want to have to force him to leave, but things cannot continue like this. Every time I think I've come up with a workable solution, or at least a jumping-off point, we just end up in an argument.

Advice?