Just a thought... and I may be wrong here... but keep in mind that by going for the very top end of the market you are more likely to be focused on clients who book a long way in advance. Big budget weddings tend to use the better venues, which of course book out a lot sooner than others.
The big name venues will more than likely have a handful of photographers that they will recommend to their clients so they can try and keep the standards as high as possible from all their suppliers.
To a some degree it is a bit of a closed loop and it takes a lot of work to break into that loop and be recommended by a more upmarket venue.
My suggestion would be to build your prices up to level you want to hit over a few years. Once you have a reputation people will pay for your services especially if you are in high demand. It is a lot easier to raise your prices than drop them as the preconception of dropping your prices causes is that they were overpriced beforehand (unless you change the product as well).
My approach has been to get established first and slowly increase my prices. However I am not just blanket increasing my prices as I also planned to change the packages to add even more to them to coincide with each increase.
I have also taken the step of limiting my availability to create an exclusivity to my brand. In economic terms this relates to scarcity. If you are operating in a niche end of the market then basic economics "supply and demand" will dictate your prices to a degree. In simple terms a scarce resource with high demand will enable you to increase the price accordingly.
I'm not sure how the stats go for other wedding photographers but I started out in business doing lots of other things as well (web & graphic design, IT consultancy to name a few) but in the first full calendar year in business I did 16 weddings. Year two (last year) I did 24 and this year will probably be around 30-35 (35 being my maximum). This year is my first year working only doing wedding photography and no other business areas. The marketing however started a good year before the first year though and I was very aggressive with it.
You need a backup/alternate income source whilst you get established unless you have got a big savings account. You also need to have a good think about your break even point and it being easily achievable or not.
Oh one final thing REALLY work on your meeting and people skills. People hire photographers that they feel comfortable with. If you can "get in front" of potential clients it can make a big difference on whether they book you or not. I know that if I have a meeting with a potential client then chances are I will get the booking. I have a 95% conversion rate of meetings to bookings from about 20 meetings (only one couple hasn't booked me after meeting me).