Well, it may be a less-than-ideal setup, but I did get an email reporting that the job had finished successfully. Being that it's the only way I can make use of the disk space I have available, I'll keep with it. I'll just have to deal with the service dropouts while it runs.
If I were to do it some other way, the only way I'm aware of to use the space on my Windows box would be to pay $40 for HaneWIN NFS server- an option I can't afford.