Must admit I feel similar @Kebal - I'm not rich!
I think HTC are asking too much money. It's one thing selling the Cosmos for $700, but the face plate costs $199 - £199! Not even any exchange difference here in the UK!
But hey, being able to upgrade for Just £200 would be great, but another £250 for controllers and another £250 for base stations. That's another £700 HTC!
If you're going to sell the main product for so much, accessories need to be less - way less.
How about offering us a recycling scheme - we exchange our face plates and controllers for MUCH MORE REASONABLY priced upgrades. After all, our old equipment will be USELESS to us. YOU create a market for refurbished parts which will stimulate your sales and the accessories market.
If you don't do something about cost, you're going to lose out. You did this with your phones and now you're doing it with Vive.
I'm enjoying my cosmos - though I have a loud fan AND the tracking STILL isn't quite right. I'm more likely to sell this and buy a new Vive kit - it would cost me less.