Let's do some back of the envelope calculation:

starting total compensation: 150K. If your partner works a similar job, your combined annual income is 300K.

No income tax in Washington State, so Federal + FICA taxes would be ~70K (look up any online calculator).

Rent ~1800 per month or 22K per year (based on Zillow's data for 1bd/1ba in Redmond, WA). Living expenses of 2K per month or 24K per year.

You are looking at 300K - (70 + 22 + 24)K, or >180K potential annual savings. Let's double the living expenses or throw in student loan repayments on top, but saving 100-125K per year is easily doable for such a couple. And in a couple of years, you have 200-250K for your downpayment.

Hmmm... does add up can't deny that. But in reality I don't see many of my professional friends saving anywhere near to this kind of cash. Childcare, loans etc seems to really eat into it.

Yeah, This leads to the general convention of getting a house before having children. It is easier to save and stack cash without them.

A spouse making another 150k is a big assumption. It's mostly males living in such places.

Save 50k a year for 4 years isn’t that hard making $150k. Take home is 100k. Rent with a roommate is 2000. Monthly expenses is 2000(mobile service, food).

Under these exact circumstances, it took my now-wife about 4.5 years when she was still single.