People's circumstances vary so some parents really do need to lend, rather than give, money to grown-up children. I am trying to be as supportive as I can as a friend is going through this yet again with her son - he just doesn't seem able to handle money, has had costly disastrous relationships, and two children to support. My friend has said so many times that she really can't bale him out again but then, when she gets a desperate message (as she did last week), I know it's hard for her to ignore.
We were fortunate in being able to give our son money 10 years ago towards a deposit on a flat in London that otherwise he would not have been able to afford to buy. We told our daughter who, with her husband, already owned a flat, that the same amount was available for her too and she took it up when she needed help with paying for a course and later, to reduce their mortgage.
I feel so sad for your situation caz55 and wish you well in working out the best way forward for you in dealing with it.