The courts look at circumstances including moral fitness, mental and physical health and demonstrated capacity of each parent to provide a consistent routine, among others. (rkkattorneys.com)
(b) The court may, in its discretion, consider the earning capacity of a parent in lieu of the parent's income, consistent with the best interests of the children. (anfusocpa.com)
A comparative determination of the custodial capacity of each parent must be done. (divorcesource.com)