Does the description below tell us that the building below is a hybrid because it has steel column in certain?

place…? Here is the sentence …
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This former landmark office block of 30 storeys featured a concrete core throughout, but with concrete columns up to the 21st floor and steel columns between the 22nd and 30th floors.

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How cheaply could I have a house built using steel construction and SIP panels?

I live in Greenville, TX – about an hour east of Dallas. I’ve seen estimates for a 40 x 80 (3200 sq feet) steel building (like a barn – support steel, roof and walls) for about K. I’d like to use SIP panels and enclose half the building for a house at first 40×40 (1600 sq feet). I’d have about 8 windows and 2 exterior doors in this part. Then I’d add on in the other half as money allowed. I’m hoping to find 2 acres of land for around K and finish the whole project for around – 80K. This will be a plain house – plain concrete floors, walls just taped and bedded (no paint or trim). I’d need 3200 sq. ft. of foundation poured, electric, plumbing, septic, SIP panels, plus tubs, sinks, toilets, etc. I know this is impossible to nail down – but best guesses will be appreciated. Any advise you have will be welcome. Thanks

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