I am enthusiast about BTS as it also has a iOS, Android, Linux, Mac OS, Windows version.
If you have a server well let that one be the master or add the share on it too.
For versioning you can implement rsync --backup --backup-suffix --backup-dir using cron.
On thing is sure: it is not a third party indipendent solution. How do you think your mobile reads your home pc's hard drive while on a non LAN scenario? Routers and firewalls do not work magically...
So devices contact a mediation server over at Bit torrent's site and that operates the magic. So not good as traffic would be mediated
I just wish to use Dropbox clients on my own server. SFTP is a cross platform option (andftp, ftp, dokan ecc, syncovery ecc) but it is slow. Syncovery (paid app) only supports lin win mac but gives full control (conflicts must be solved manually). From Android and iOS I access files through sftp.
An "as dropbox fast sync" solution with cool mobile app and totally hosted would be the solution.
Maybe BTS could be tweaked so it uses only my routers? Will check
Owncloud.org Seafile and iFolder could be interesting