Total gut 3-family

No.

It's not even close. The cheapest you could expect it to be is 1.2 mil. Maybe you meant to say is 150k realistic for a architect?

What if it is a 3 family house in sheepshead bay and gut Reno is just mostly new every thing but budget: stock floors $4 per sq ft, basic stainless steel appliances, basic tiles in bathroom etc? I had gotten an estimate from a Staten Island based architect for his services of 20k. Functional every thing with not much design or fine details.

If you're renovating as a primary residence (rather than as an investment property), you can assume $100/ft2. If you discover no major issues through the renovation process, $280k ought to be a reasonable estimate.

If its a gut renovation you could expect to spend at least $300 sq ft. Thats with all new plumbing and electric.

3 family home means at least 3 bathrooms and 3 kitchens. I know builders in Queens who are doing from the ground up 2 family's fin the $400K-$600k range for lower end finishes, but $150K is barely going to get new kitchens and baths these days.