Are these data going to last 20..30 years or will become deprecated?
This data stays so far when it is actual. To capture 3D data from a communication cable, then you can keep this info until when is maintenance time and you need to know where it is and how it is installed. About dataformats pointclouds and mesh model can open and also use after 20-30 years. To keep exact capturing in time depend is it need to keep it or not, depend situation.
Do you do only data scanning services or prepare your product? Do you offer as end result not only raw data, but also “full package”?
We also collect but mainly prepare exact info what clients need. Target is what client need, then we but together all needed processes to get result ( scanning, lidar, drone, gis data and etc).
What kind of architecture programmes are the best to work so that it supports exporting to the 3d scanning and Arcgis showed model?
There is multiple question and maybe also something misunderstandings. 3D scanning give pointcloud. To make model ( geometric and include element models: floor,window, door, ceilings and etc. ) can make also inside Esri, also an use any BIM software ( Revit, ArhiCAD and etc) what support 3D modelling. Esri also has direct Revit model support.