Before you start dosing, read Eric Borneman's RK Mag articles on renewing sand beds and vodka dosing. He is very knowledgeable and I have found that taking what he says to heart will save you a lot of headache. If something sounds to good to be true, it is.
70 corals in 6 weeks? I sincerely hope it works out but don't you think you are rushing things. Nothing in a reef tank happens fast, except disaster.
Take everything you read in forums with a grain of salt, including what I have to say. Listen to the experts like Eric. Go with practices that last the test of time. Vodaka, along with many other methods come and go. I recently did much research and vodka may not be very good long term. Decreased biodiversity being the largest negative in my mind. Read as much as you can about it. Good Luck!