be economical

See: retrench
References in classic literature ?
But he had learned how to be economical, and out of that four dollars he went on saving money."
"If repairs cannot be made to be economical with my car's value then it will mean I will not be able to get another car.
AIF you know exactly what you need it can be economical. But websites will not advise as to the suitability of any policy.
But recent press reports have quoted some of her family and former friends as suggesting she can be economical with the truth - and that she changes details depending upon circumstances.