Excuse the friendly jibe but you might consider dropping Hostgator next! I really respect and find valuable the idea of OwnCloud, but I have heard so many horror stories about files being deleted, slow sync times and bug fixes being secondary to the development of new features I have been put off. Has it now matured and can be considered more viable? I have been using BitTorrent Sync (with a Raspberry Pi as 24/7 server) personally and have experienced zero issues. I wish it was open source but it is great as an alternative to DropBox if 'owning your data' is important to you.
We implemented owncloud in our company of about 500 users spread out in 33 countries last year, and besides some minor glitches with some users ( mostly user errors ) the implementation has been very successful. our original purpose of owncloud was for people to have a backup of their working files in our server ( because they travel a lot and equipment loss rate is high ) but they are now using owncloud for file sharing and work collaboration...we use server version 5 with the latest client which right now is 1.5. some teams in our company were using dropbox, but now are using owncloud...I guess for security reasons.