You should be able to change the "to" and reply address for a gmail account to use the professional looking address, yet retain the stuff you like about your gmail account.

If the only difference between a co-signer and an applicant is a second job or some other insignificant factor, they are NOT co-signer material.

While the IRS does not mandate a physical site visit, the IRS cost segregation audit technique guide (ATG) does suggest conducting “field inspections.”It’s important to note that the ATG is not an official IRS document.It serves as a guide and cannot be used, cited, or relied upon as an authoritative source.However, the recommendations in the ATG are worth considering.According to the guide: “A field inspection is recommended to document the physical details of the building, type of construction, materials used for construction, the assets contained in the building, the size and types of building systems, and any land improvements that were included in the purchase of the property and the condition of that property at the time of purchase.”So while the IRS does not require a site visit for cost segregation studies, following the guidance from the cost segregation audit technique guide can be beneficial.

We often say you want to retain the surface rights to run with the land. 

Your fridge and stove, while new, still has shipping material on them.

You must also materially participate in your RE activities.If you materially participate in each RE activity, losses are fully deductible.

Shortages of construction labor and material will also have a major impact upon pricing. 

What materials are used besides the LVP itself?

Quote from @Davin Manfredi: This is a construction material on the remodel or work done on the home, so I would say it would fall on you.

To qualify for material participation, you generally need to meet either the 500-hour or 100-hour rule.