Quoting / Estimate - Module initially developed as an utility for company websites that provide services, but not necessary trough bulky and shop-oriented e-commerce interfaces. It is meant to be very customizable.
To keep it customizable, my word of advice is to build a feature over it with the 2 required content-types and other customizations. You will also need strongarm and ctools to properly build this module-pair [Новые модули]