@Jae,
I've seen those posts everywhere too. I don't necessarily agree with all of them, but I've seen them.
My answer to your question is, what is your skill level. Are you very proficient at C++? Do you have knowledge and experience with MySQL and dealing with SQL querries? How are you with networking, encryption and security?
If you can say that you are experienced in these areas, then you have a chance to make a good MMORPG within a few years, and I would suggest starting with a single player RPG. If that turns out good, make it multiplayer. If that works out well, then take it MMO.
I'll qualify all of this by saying that I have 25 years of experience programming in 12 languages, and have been working on my own MMORPG for the last 18 months.
By the way, since you're already working with C++, I wouldn't go with Multisync for an MMO. I'd use RakNet. It has lots of built in features that help you overcome problems in LAG, encryption, and security.
If you are much newer to programming and don't yet have the skills mentioned above, then definitely start with something small. Pong is ok, but Asteroids is better.