3D Cad Development

Hi everyone.
i need to develop a 3D milling cad for a company. I’m not gonna re invent the wheel, so i was looking around for a good 3D engine, and i got unreal, which is of course game oriented.
Apart for my other games projects i would like to use unreal to develop this 3D milling software but i need to be able to create, interactively, a huge amount of lines and polylines.
Is this achievable with unreal?

Did yoiu manage to find anything?