Second thing would be to work with a contractor, this is great stuff to do since you know building a house, building material costs, and knowledge of right and wrong what to do. 

If it is a high end housing product you may have to use a designer because they have access to some material/finish suppliers that are otherwise unavailable but that tends to only be for the highest end housing deliveries.

To remedy that, the carpets should be ripped up and sealant applied to the subfloor, at minimum.There are also tiles in the smaller upstairs bathroom that are lifting up and creating a safety hazard; putting a rug on top is not a sufficient solution.The house is in a condition that materially interferes with the health of household members.

I disagree with you regarding materials, however.

Creative Freedom: You get to design and transform spaces, which can be personally fulfilling.The Bad: Where Flippers Lose Money⚠️ Underestimating Repair Costs: Surprise structural issues, contractor delays, and material price spikes can kill your budget.⚠️ Market Changes: A hot market today might cool down before you sell, which reduces the profit.⚠️ Financing Challenges: Hard money loans carry high interest rates that nibble into the bottom line.Unrealistic timelines: If you think you're going to be in and out in 60 days, you're sadly mistaken-most flips take longer than expected.Real Talk: Is Fix and Flip Still Worth It?

The ground floor was redesigned for retail units, while the upper floors were converted into modern, open-concept office spaces.Modern Amenities: Introduced features like energy-efficient lighting, upgraded HVAC systems, and high-speed internet infrastructure.Aesthetic Upgrade: Refreshed the façade with contemporary materials while preserving historical elements to maintain its character.OutcomesIncreased Occupancy: The property went from 40% to 95% occupancy within six months of renovation.Higher Rental Rates: Upgraded spaces commanded rental rates 30% higher than before.Enhanced Property Value: The property's appraised value increased by 50% post-renovation.Investor's ROIBy investing in smart architectural design, the investor not only revitalized a neglected property but also significantly boosted their ROI through higher rental income and property appreciation.

LVL material, preference for an open floor plan, make this renovation very popular.

That will increase your material costs for the job and is the contractor paying for the material in their bid or are you paying for it and paying them a labor cost.

Quote from @Samuel Kim: Hello i am a doctor who wants to use cost segregation/bonus depreciation on my 9 rental houses, my home maker wife wants to meet the 750hr test to obtain real estate professional status and material participation.

To qualify, you must meet material participation rules (100+ hours and more than anyone else) so that rental losses can offset active income.