Renovation on 3 unit home!

[Shannon Richardson]

I found a multi-family home in the southern part of New Jersey that's in amazing condition and needs little work.  The only problem is I don't know where to begin. I have a few ideas in mind but due to me not being a rehabbing for flipping specialist my knowledge for home construction only goes so far. 

Would love to hear from everyone about how they would go about it no matter how little, any type of input would be appreciated. I would love to even hear what current landlords are using in there homes now that is cost-efficient while being high quilty and appealing. Also, would love to hear from different contractors as well.