Are you suggesting that I should proceed with off the shelf modules rather than laying out a Board.....
Depends on your volume, in the short term and to reduce design cost and time, modules might be the way to go.
I am trying to decide what to use with a similar project myself but instead I need 2x USB 3.0 for the cameras and I don't have enough time to design a board from scratch so will probably use a Intel compute stick or similar.
If you have already done it on a workstation, you at least know roughly how much computational power is required and maybe look for a similarly or more powerful SOC that meets your requirements but this sort of thing will take a long time to design and develop an OS.