Frequent commenter Lion of Zion quotes the following commentary from Seforno on last week's Torah portion (link):
Commenting on אעבדך שבע שנים ברחל (Gen. 29:18): אין ספק שלא היה הצדיק נושא אשה ומעמיד בנים אם לא היה בידו לפרנסם בפרט בשאר וכסותLet me translate into English: There is no doubt that this righteous man (Ya'akov) would not marry and have children if he did not have a way to support them, particularly with food and clothes.
I believe that having a plan is good enough.