We've been using AC in the Cloud for over a year and are very happy with it. Verizon Fios may not be adequate. I have a Charter cable business connection with 50mbps speeds. AC advised at least 15mbps when I talked with them last year. I use Excel also and had it added to my Cloud account. The charge last I recall was $15/m for that.

John Howland, M.D.
Family doc, Massachusetts