best financial route for gut renovation of commercial real estate

[Kyle Charles]

Good Day,
I inherented commercial real estate in Brooklyn NY that is in desperate need of renovation in order to generate a monthly income of $30k... I'm currently low on personal funds but the property has nearly $3 million in equity. I was told that in order to utilize any of the building's equity, i would need to give a 8-10% down payment on the desired loan amount... was thinking about maybe refinancing my primary home to make the necessary down payment... is there a better alternative to obtaining funds for this project?