Earlier quoted context omitted.
Unless you mean both spouses should earn around 200k and thus bringing in a FAANG-equivalent income of 400k, I really don't know how you could afford what you are saying on a single 150k-200k salary (and perhaps another 50k for your spouse's salary, since not everybody works in tech). After paying for CA taxes, fed taxes, kids' schools, rent, car expenses, 401k contributions, I really don't know how you would come up…
Why would it matter 20% or 700k as a seller I get the full amount from the bank.
Also, many folks in the Bay Area just go all cash, and that's obviously much better for the seller since it means very fast closing.
But this if off topic, because a person on a 150k startup salary in the Bay Area won't be able to participate in any of these discussions.