Any adult with a full-time job should be able to afford a studio or small apartment. Probably making concessions on the location depending on where they want to live. It's not a matter of being young or not

In the US, this is trivial to do. Theres plenty of states where unskilled entry lever wages easily allows this life, for most of the locations, with the exception of extremely high cost city centers.

Pick IL for example. Min wage $15, so $30k a year income fulltime. Most every adult that’s worked even a little should be able to earn decently more than min, which is for completely unskilled, new workers. Median il wage is 66k.

Even at $30k, the rough 30% rule on housing is $750/mo. At 66k it’s over $1500/mo.

Dig through smaller cities, and you’ll find apartments to rent in either end of this range. This works in any state.

Part of the issue is those smaller cities don’t offer a large supply of job opportunities. So people are often not able to pick and choose their location.

This is an underappreciated argument for basic income/UBI: you need a lot less of it since its very existence enables recipients to move to lower cost of living locations.

(Which in turn opens up opportunities for others to move in to the higher-cost places and boost their own productivity.)