A year ago I recently purchased my first multi family to house hack and I rant into a issue when the seller paid for a electrical upgrade to the home.

You can always start with the Simple Start subscription and upgrade if you find that it isn’t meeting your needs.  

.- Value-Add Investments: Beyond cosmetic upgrades, think about adding amenities like solar panels, EV charging stations, or smart home tech.

., 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.

The house includes high-end upgrades such as custom cabinetry, granite countertops and energy efficient appliances.

The lot size, the pool, and the quiet cul-de-sac location provided great bones, and with the right upgrades and modern touches, it could command a much higher price in the competitive Hamptons market.

Anyone has a recommendation for affordable yet experience designer to help with few hours of consulting to upgrade the look of   new airbnb?

That would be a great upgrade.

Will you look to upgrade the property and then refi in the future?

The electrical panel is original, so an upgrade might be needed in the future.