Seeing the pricing you propose for 1TH in model B (1,000-1,200BTC/TH/year), I'm afraid your IPO price will be too expensive. I would take into account that Bitfountain's IPO price was 0.1BTC per share, for an expected deployment of +250TH. If I do not recall it wrong, each share is 1/400,000 of the total profit/hashrate, which means that their price for TH was 160BTC, not a hefty 1,000-1,200BTC price tag.
Even at today's difficulty, a TH would take about a year to earn 1200BTC. Ridiculously overpriced, especially as that price only leases you the hash rate for a year.
At today's difficulty, 1 TH/s will make 1200 BTC in 27 days. (without electricity costs). You know, 1200 BTC per 1 TH/s is 1.2 BTC per 1 GH/s. Similar price as Avalon #3