There were no conditions placed on the prodigal's son returning as per the bible story.
If it were WT he would have had to live as a homeless person on the edge of the property for a few months.
Then, he could live in the barn and have bread and water for a few months.
Then, he could have a meal with the fam once a month for a few more months.
Then after a year or two it would be "my son, my son has returned. Kill the fatted calf we are part-ay-ing tonight!"