The easiest out of the box solution is log shipping which is well-documented
in books on line (BOL). It's not exactly what you requested, but achieves
the same ends by shipping just the differences since the last
synchronization and this almost always amounts in smaller files being
shipped. The only restriction that distinguishes it from your request is
that the database will be read-only.
    Cheers,
         Paul Ibison SQL Server MVP, www.replicationanswers.com .