The change of the hosting was finished after 2 days. And today, I got good news that the domain transfer was successful, too. Finally, I could sleep easily at night.
After 6 years of using DreamHost, I had to switch to a cheaper one to reduce the yearly payment. This time, I paid 4 years ahead to enjoy the most benefits. The 4 year package was still cheaper than the 1 year at DreamHost.
The differences aren’t much. cPanel is also as easy to use as the Control Panel of DreamHost. However, the support wasn’t as good. But I didn’t expect an excellent service for such a cheap price.