Been away from this project for a while, but finally got back to it yesterday. I have set up a VM with SCSI/LSILogic, host I/O cache and 4GB RAM (host has 32GB). I have, so far, loaded Windows 7 Professional X64, performed all the updates, installed Guest Additions, installed Sage 50 Accounting (that was the original goal here), done the Sage updates, Installed MS Office 2013, done even more updates. I set up the original VM with one processor. I have since increased that to three processors, to make Sage a little snappier.
Right now, I'm installing yet another pile of updates. So far, all is well. Fingers are crossed.