Hello,
I would like to work into your project, if I'm correct you will not be selling anything online, but will make quote prices.
We have 2 options to this:
1 - develop from scratch to the all running website, with the functions you need.
2 - use a custom cms, customize it to only make quotas and focus the project on the design.
you can choose what you will need, if we develop from scratch we will have a custom solution perfectly with what your want.
If you think we can use an ecommerce cms to make your site we can focus the entire project into the design, and if you change your mind to sell products online you will need much less work to adapt.
feel free to ask me anything.
Regards,
Pablo Silveira.