Let's try to assume these are the cost structure of a R/C Design and Manufacturing Company.

(A)- Labour Cost (developing countries with low-cost labour benefit here, geographically perhaps, I would pick China just an example)
(B)- Cost of quality components (high volume order of one component makes a part cost relatively lower, do you have big orders for Balsa wood from Balsa wood exporting countries, is Balsa wood is the primary cost component ?)
(C)- Cost of machinery (wood laser-cut machine/shearing machine)
(D)- Customer Service (a competent and customer-oriented e-mail and telephone hotline to start it all).
(E)- Competitive contract with distributor (carry my products on your website please)
(F)- Freight cost (that's determine your R/C plane at your door). Freight company contract with you.
(G)- Manufacturing sites (are they located at various locations close to Europe, Asia, US to give the most benefits to the customer ? Customer do not want to pay exorbitant prices for freight charges.)
(H) Licensing of brands to various manufacturing sites.
(I) Marketing costs. (think about negative image from bad publicity of an unhappy customer complaint in an active forum like this).

I would be curious to know who has been licensed to manufacture for whatever big names in R/C planes you have in mind.
From there, I get a clue about quality. Do you believe a factory have different skilled operators and machines of different capabilities (accuracy) for different names ? I wouldn't, most probably.