I installed 6 shades last year (Bali/Costco and Bali/Blinds.com). As I recall, mine were about $600/window. Keep in mind that the size (several of mine were towards the largest they could make with a motor), controller/power and fabric all play into the price.
I did this in two phases, and thought that blinds.com had more option selections so tried it for the second phase. In the end, the Costco site is hard to deal with, but ensures that you don’t order something they can’t make. The Blinds.com site works better, but they allow you to order things they can’t make, and then a rep tries to help you fix it. In the end, both were competitive (and both had “deals”) and had similar products, but Costco delivered faster. I did not try Zebra blinds.
As indicated in the other comments, Bali has Z wave built in, and it works with ST. Although I was forced to buy the default transformer, I sourced a separate high efficiency 12 VDC power supply (much cheaper than the ones sold with the blinds) and a separate USB connector that I used for each set of two blinds. These were plug in power supplies and I ran the 12 VDC outside the wall, until I have a better solution. There are several options for central power supplies that may cost as much as the blinds…
While the codes are typically less stringent for low voltage wiring, if you do run it in the wall, I think you need to use plenum rated cable. Code requirements will vary from place to place though, so I’d check ahead of time. Also make sure you size the wire properly.