Acquire about 200 GH/s ASIC, join a pool, and you'll make 1 BTC in 24 hours, maybe more 
Yes, but getting 200 GH/s ASIC cost a lot if you want it now. But if your ok with preorder, you cant count 1 BTC in 24 hours
a miner contract is speculative. you can easily be scammed.
I'd recommend you to just buy a bitcoin through an exchange or from a trustworthy forum member. Remember to always use Escrow