@Lacky301 I agree with @Ohnobackagain. You have been very supportive while your son was studying for his degree but now your son has finished university, and as you are both now struggling, contributions from you and his Dad should stop and you need to just tell him that. It'll be up to him how he finances himself now.
I would give him some 'notice' that after x date, your financial support will have to end and leave it up to him to decide how he is going to financially support himself, while he tries to get a job in his chosen career, because that may take a while.
I suspect, when he says that he wants to stay where he is for another few weeks he simply isn't aware that you and his Dad will now be struggling to financially support him and won't even have given that any thought to that part of things at all. It doesn't make him 'bad' or 'lazy' - but like many young people, having been supported up until now, realities of what it means to support yourself fully as an adult, can take time to fully comprehend and can come as a bit of a shock
YWNBU to tell him you can't afford to keep subsidising him now and he'll have to decide how he wants to get some income. You have had a bad time on here, and it doesn't help to be so strongly criticised when you have asked for advice, but I do think both he and to certain extent you, are being a bit naïve how long it may very well take him to find a job in the field he wants and you are absolutely right to want him to start to stand on his own 2 feet financially.