.... Rather than say
"more realistic" I think it would be fairer to say
"more affordable".
But when price comparisons against the lens equivalents offered by what our learned friend
@peat calls
"proper cameras" (Canon, Nikon, Sony, full-frame) are made, then the £6K of the Olympus lens is extremely good value for money and has several major advantages over them too.
Back in the day when I was a professional Art Director I worked with a variety of international professional photographers, many who were specialists in their fields, and most used to think that 35mm cameras weren't "proper cameras" because they used larger formats - Hasselblad up to 10x12 plate cameras.
.... It's overpriced for your budget of £3K but that is quite different from being overpriced in the lens market.
.... I respect that this is your opinion but I it appears to be based on rather fixed and out of date ideas.
Whereas it was true over 10 years ago that no zoom lens could match a prime, this is no longer the case due to advances in technology. For example, the Olympus ED 300mm F/4 Pro is established as a very sharp lens and the ED 150-400mm TC Pro matches it, and that's not just my opinion.
Being an ex Canon shooter I know much more about them than Nikon or Sony and the Canon L lenses are stunning, especially the latest RF mount L lenses. The Canon EOS mirrorless bodies are excellent too, so what's stopping you
"switching back in a nano second"?
I hope you are not disappointed with your new OM-1 and will be mounting it on some Olympus / OM Systems PRO lenses to realise the full potential of the m4/3 format. If OMDS produced a full-frame camera body I reckon the likes of Canon would have some very serious competition indeed regarding image quality excellence.
I think we will at least agree with each other that there is no such thing as the perfect camera nor the perfect lens
THE PHOTOGRAPHER MAKES THE PHOTOGRAPH by
Robin Procter, on Flickr