(All of this is also with the caveat that I don't know the details on your current home). 

Do you know how much the typical bills have been in the past?

South Utah County and the Eagle Mountain area are where I would be buying and specifically new construction and small cheap single-family homes.

Key Details of the 45L Tax Credit:The credit offers up to $2,000 per eligible unit for builders and developers of residential homes that meet specific energy efficiency criteria.To qualify, the units need to meet or exceed certain energy performance levels in comparison to the national model energy code (e.g., the 2006 or 2009 IECC — International Energy Conservation Code).Cost Considerations for a 90-unit or 112-unit Project:The actual cost of qualifying for the 45L tax credit depends on various factors, including:Energy Efficiency Compliance: The primary cost will come from ensuring that each unit meets the required energy efficiency standards, which typically involve energy modeling, certification from third-party energy raters, and potentially upgrading insulation, HVAC systems, windows, and other components of the building to meet the necessary performance levels.Energy Modeling: Typically, you'll need to pay for an energy consultant or engineer to model the building's energy performance and ensure it qualifies for the credit.

Have you thought about just renting a 4–5-bedroom home and house hack it. 

@Shea Gajewski Find the most nit picky, thorough, excessive home inspector you can.

Quote from @Geoff McFarlane: We bought our current home in 2011 for $97k.

Homes are sitting around 40-60 days.

This means the rental rates are average nothing to write home about, but the increase you'll get in appreciation is amazing, but not liquid until you sell. 

For example you advertise Home Depot discounts and I can’t find that anywhere, please guide.Anthony @ Skyline