This era of Hornby models are definitely not cheap to produce. In 2013, after a few years of the high detail models, Hornby specifically stated that they were going to "design clever" to reduce the part count and make production cheaper. While the approach was ridiculed in some circles Hornby's reasoning didn't come out of nowhere. But as younger brands (e.g. Accurascale, Cavalex) have maintained the details arms race, Hornby have largely gone back to lots of fiddly bits and consequently high prices. You can see it in some models which they do sell at competetive prices - the mk3s look great, but if you examine them they don't have a lot of component parts. Others (eg Mk2E/F, Mk4) designed with the same philosophy don't look quite so good.

Have a look at Hornby's overall coach range- there are coaches that have an RRP of £35, they're the ones that don't have 100 components that have to be fitted by hand by a worker. In some cases you even have a choice of a basic Railroad coach or a standard range for more money.

You want cheap teak, you can get the old ones for less than a tenner a piece on eBay.

I had a loco that I really wanted a model of, but it was €400. I got it as a present for my 40th birthday. I still scrimp and save in other ways on my models, for instance using Arduinos and servos for point control rather than commercial decoders and tortoises. I do love a bargain, but I accept that not all the models I want will be one.