It's worth keeping in mind that Tony's current monthly figure ($45k/mo) is a a single snapshot in time. Past performance is no guarantee of future success. Certainly, a talented engineer consistently making ballpark $100-200/k a year over the same period and saving a reasonable percentage of that is going to be more financially successful and basically guaranteed lifetime of employment at a high tech salary.

Long story short, it's a worthwhile achievement but it only happens to a lucky few. Focusing on building a long term career and becoming quietly rich is probably a better play.