DS moved to a new city when he graduated and got a job. We helped extensively to help him find a flat (ridiculously hard due to high demand), unfortunately all he could get was unfurnished, so we kitted it out for him with furniture, crockery/cutlery, kettle/toaster/etc, DH built all the flat pack furniture, and we gave him our old car as the bus route was crap on the road he lived on. We rented a holiday cottage for two weeks whilst we did all that, as his first day at the job was before he could pick up the flat keys, so first week he lived in the holiday cottage with us, whilst we set it up and then he moved in for the second week, whilst we still kept going to buy more stuff that he needed.
Then, after 18 months, he had to move, but this time, he dealt with estate agents himself to find a new place, but we still booked the end of tenancy clean and removal men, and spent a few days helping him move out/move in.
Just six months later, he had to move to a different city, living in a furnished HMO, so couldn't take any of his furniture, so we got most of it sold, got a charity collection to pick up what was left, took his car back to our home town (he didn't need it in new city), and took him and a car full of personal stuff to the new city and helped him unload.
Sounds a lot of help, and it was, both in terms of time and money. But realistically, we genuinely believe he wouldn't have stayed in his first job had he had all that to deal with on top of the stresses of a first high pressure job and studying alongside for a professional qualification! We've not created a precedent either. In his new job/new city, he's done it all himself, sourced his own accommodation, sorted out transport, bought everything he needs that we couldn't fit in the car. He' basically now fully self sufficient, never rings us for "help", we no longer financially support him, etc. That's not to say we wouldn't help in any way, but he's doing very well now on his own.
It's how it should be, help them when they need it and pull back when they don't.
Neither my parents nor DH's parents gave us any help at all. When I needed to buy my first car, my mother gave me a "loan" towards it and expected me to pay back with interest! I only did that once - sorted my own finances the next time! When we got married, just bought our first house, DH went self employed, I became pregnant, we were really struggling financially, but neither sets of parents offered any financial help. It's not as if they were poor, they're all dead now unfortunately, and it turned out both sets of parents had substantial savings - we've already used some of that to help our DS and in our minds, it's "ring fenced" for him when he needs more help, i.e. deposit for his own flat/house etc.