We need a flexible configuration of partitions, subsections, fields, accesses, etc., that is, like a constructor: to implement the necessary CRM functionality from scratch without the programmers help or with minimal their participation.
Amosm, RetailCRM and Bitrix24 are not suitable, they do not have such flexible settings and the possibility of changing the functionality.
We would like to order a development from scratch. But it's too long and expensive. And in addition, expensive updates are obtained when developing CRM "from scratch." Therefore, you need a CRM-constructor (like the website designer, where you can make your own website for 1-2 days without web programmers help)
Which options are optimal in this case?