^ This
And the scale applies at every single step of the process. A citizen homebuyer is playing a oneshot game. There are few discounts to be had and every single fee is its own battle.
A corporation/PE is playing a multi-shot game. There are bulk discounts, relationships, and scale that is applied to everything from title insurance and inspections to cost segregations to filing all of the paperwork.
> There are few discounts to be had and every single fee is its own battle.
Also if you take a 10% gamble on a strategy to save 50k and it backfires and lands you with a 500k legal bill, that's just the cost of business to a big (or even not that big) company, but it'd be absolutely ruinous to private individuals.