New Shopping complex construction costs

[Jay Real]

I am *Thinking* of venturing into commercial real estate via a small shopping complex project, around 10Ksqft. Since i am new to commercial real estate investment i need some help in estimating the ballpark cost per sqft number for construction, apart from land/permits. Just the construction part. 

For new complex do i need to provide only shell to the tenants and tenants finishes it? if so will tenant demand a credit for doing the interior.