lets work through this..

first off miners lab, LTD  has been in the hardware business for quite a few years, you can actually pick up the phone and talk to them i have also verified their address, owners and bank that they deal with, yes they take wire transfers through an English bank.. i am only contemplating  using BTC as they are willing to provide a discount, however i am perfectly fine with a bank transfer , actually it would provide a better audit trail..

Minerslab also provides hosting on a 3 or 6 month basis  the hosting includes all costs, this is already figured in to my capital expenditures. we are not taking physical possession of the miners, they will be housed in their data center,
our company can request delivery of the miners anytime.

additionally as stated we have accounts receivables that can be used as collateral and can be factored if need be.

as far as an interest rate, well i don't know what the rate for BTC lending is so i would rely on the lender to offer terms.
we know what our projected ROI and monthly cash flow, so if the terms are sound and can be met  then we will move forward   our goal is to payback the loan withing a few month and then reinvest  until we can acquire  12GHS of asic scrypt mining power

one additional note, we are not opposed to set the miners in escrow we need to be sure that it is a safe location and that they will be accessible..