Some industries have incredibly long sales cycles and you will use up all of your savings and then some getting your first customers. If I were to do it again

Some industries have incredibly long sales cycles and you will use up all of your savings and then some getting your first customers. If I were to do it again I would focus on the creating a solution to the smallest subset of the problem I am solving and trying to sell that. Program that one feature and do not start on the next feature until you have a paying customer for the first one.