You could also call a couple of contractors on the phone and get rough sqft pricing from them for roofing, siding,  painting etc. like how much the averages costs are per square (100 square feet) and square foot .

OpenAI, a leader in artificial intelligence, has leased the entire 315,000-square-foot building at 550 Terry A Francois Blvd. in San Francisco’s Mission Bay neighborhood.

In 2020, I built under $200 a foot with long-term rates in the 3's to get 40% ROI.

I had been insuring at $350-$400 a square foot value the last year or two

Does it have 36" windows egress, 7 foot ceilings, egress doors, HVAC, and closet door? 

The 315,000-square-foot space in Mission Bay adds to OpenAI’s nearly 1 million square feet of leased space across the city, including properties subleased from Uber last year.As one of the largest AI firms in the world, OpenAI’s expansion is helping revitalize San Francisco’s struggling office market.

This is not much different than any investor who retires using real estate except that markets and life are not that linear.

I'd say house-hacking is one of the best ways to get your foot in the door of investing.

@Irene Morgovsky what you are experiencing is that rents do NOT increase linearly with property values.Or look at it another way, the pool of renters that can afford higher & higher rents, shrinks faster than a corresponding pool of buyers.You could look into making it a short-term rental to try to improve rental income, but:1) Is it allowed in that area2) STR rates are coming downYou may have to accept "negative income" or sell.

Just sayin.. if shoe is on the other foot and your running credit on someone and dont realize its not real ??