Hey @Peter, after I wrote this(Important: Update your Node to extend its life cycle.), 8 hours passed. However, the height of both nodes increased just about 5000. That means, a rough calculation is that synching both nodes will take 230000/15000 = 15,3 days. Even if I shut down one node, synching other node will take 7,15 days.
@huglester (Jaroslav) also is in very same situation.