Root Xperia Mini Pro: A business mobile?

I planned to but it tomorrow. My prime use is in business, earlier one was E63, lost.
Mini Pro is a great one: Qwerty, android, Camera, small......(Well, I dont know many cons...may be powerless battery may be one)
Now can I download MS Office to this one?
I need to 'import' MS Word template pages (Quotation forms to be filled appropriately to each customer to send Quotes in business).
And also keep accounts details with many customers, to be updated frequently. Is this kind of 'laptop' jobs possible in it?

I know a E63 or E72 or BB is most suitable. But I love it's above addl. qualities.
Please help with your expert advice BEFORE I invest ......