Hey Jose!
I'm an ex-Engineer myself! I became financially independent by building a business, selling it, and investing the profits (with a good portion into real estate) and just want to encourage you that it is possible!
One additional strategy I would recommend looking into are Real Estate Investment Trusts (REITs). I am invested in many types of real estate deals (single-family rentals, multi-family, office, flex, manufactured housing, syndications, BRRRs, hard money lending, etc.) and my favorite type of real estate investment are REITs because they are truly passive and run by well-established companies with access to cheaper capital and better deal flow than most. You get paid quarterly passive income from rent checks in the form of dividends that are tax-advantaged (qualify for the 20% qualified business income deduction currently) and you have far less liability because you don't have a mortgage over your head.
You can also grow your passive income and portfolio size much more quickly because you can compound your earnings immediately by buying more shares rather than having to wait several years until there is enough to make a new down payment. I still like investing directly in real estate but I prefer REITs and they should definitely be another way that you diversify and grow your passive income! You have to learn how to analyze them but it's not too tough.
Hope this becomes advice you look back on as playing an important role in your journey toward financial independence!