How do you value a mix use building?

[Bin Chen]

Hi, I'm looking to purchase chase my first mix use building. It's a new construction so I have no data to estimate the expenses. There's also a tax abatement for 8 yrs left on the property. I estimate the gross rent will be around 33k if it has no vacancy but I have no idea how to find the expenses to calculate cap rates. Does any one have any experience on where I should look to find out? Do you value it based off property tax after abatement? Where can I find out utilities cost. Do buildings require waste management plans or does the city still take garage? Thanks for the information in advance.