well there are many ways to cut cost, but not everyone is willing to do it.
One is to start scratch building, yes it takes longer and I know nowadays, people want instant gratification, hence Arfs
This way you are in control of your build and not factories overseas., again not for everyone.
Another thing, generally, people think if its not expensive, it can't be good, for instance the best radio on the market right now for its quality, programmability , and bullet proof solid 2.4 is made by FrSky , the Taranis, Taranis Plus, and with two more coming soone, The Taranis has up to 32 channels, and the programmability is by far the best on the planet. but it only cost around $250 while the Futaba 18 cost around $3000 and doesn't do as much as the Taranis. that is an example where people are spending way too much for a radio, Futaba, JR and such does a lot of advertising, sponsoring etc. so when people see some to names in the business using these radios, they automatically think its the best , well think again, they are sponsored, which means free to them .
Someone was heard saying , "I won't trust a $35.00 receiver to my $ 4000.00 airplane" and someone replied, " we can add an extra $100 if it will make you feel better"
A Ferrari is a very expensive car, yet its no better then your Ford , or Chevy, think about it.
I will keep like this for the time being, but lots more to talk about