Value add opportunities in NNN?

[David Babayev]

In commercial multifamily, value add opportunities may allow for a cash out refinance that helps cover the downpayment towards the next property. In this way, people scale their portfolio probably more quickly than they would if they just saved up money from their day job, and can theoretically get to six figures "passive" income relatively quickly.

Does the same work for NNN properties? Are there value add opportunities in NNN?

If not, what are some strategies that people use to grow their NNN portfolio? Is it all generally through syndication/pooling money together?

Is it possible/likely to attain a six figure "passive" income within 3-5 years doing NNN deals?

Obviously, the relative passiveness of NNN is appealing to me, but I'm starting to think NNN is more for long-term and steady wealth-building, rather than for big and quick returns.