[...] and money isn’t an object
Then hire an engineering consultant for the job
I just want to know if any of you guys had ever used a sensor than can detect a metallic object from 1 metre away.
Also a sensor to recognise colour from over a metre away?
First off, you need to define your targets a bit better, since there is quite a difference to detecting metal objects like sewing pins and eg. a bicycle and the kind (or range) of metals is quite important too, each metal has it's own properties.
Same with colour, is it a pinhead or a football you need to detect, how small differences in hue do you need, how many other objects will be in the vicinity etc.
When you have spec'd out your needs that way, your search for detectors can start.