When DS moved away for his first "proper" job after graduating, we "helped" him a lot with his flat. The only way he could get a flat was to pay a year's rent upfront, so we paid that and he's paying us back monthly out of his wage. After the year, he'll pay the landlord directly every month.
The flat was unfurnished, so he needed a bed, sofa, wardrobe, drawer unit, desk and chair (partly working from home), and all kitchen/bathroom supplies, microwave, drier, kettle, toaster, etc. Likewise, we bought all that for him, OH built all the flatpack furniture, we waited in his flat over the week to receive deliveries of it all (son's first week at work). We rented a holiday cottage for the week, so he had somewhere "nice" to live during the week that we were putting his flat together. Again, other than the cottage rent, he's paying us back monthly for it all, and is happy to do so.
He's said many times how thankful and grateful he was to us for taking a week out and setting up his flat. All that time and effort we spent means more to him than the monetary side of it. It meant that he could concentrate on his job and didn't have to worry about deliveries/buying stuff/setting up his flat - once it was all set up, he could literally just come home and it was all ready for him to chill after a hard days' work.
We won't be doing it again. He knows that if/when he moves, he'll have to sort it all himself, in both financial and practical terms, and is happy to do that.
Because we adopted a "hand up rather than hand-out" approach, he's matured really quickly which was our hope and intention.
With him having to pay us back monthly, it reduces his funds so he's careful with what money he has left. He's very much into shopping carefully, i.e. buys load of yellow sticker stuff to freeze, uses clubcard pricing, always on the lookout for BOGOF and other deals, filled his boots last week with the Co-Ops pizza and beer offer for the Euros, etc. They're good habits to get into. If he wasn't paying us back, and had more money "spare" I don't think he'd make as much effort towards cost savings.