Does anyone know if a business loan can be used to purchase a multi family complex? Is it difficult to get approved for a business loan? 
It depends. There are a few factors to consider but I would highly suggest you consult with a loan officer or your accountant. I have access to both contacts. Let me know if you want me to send them your way.
Does anyone know if a business loan can be used to purchase a multi family complex? Is it difficult to get approved for a business loan? 
You can use a DSCR loan to buy a multi family property. No, it's not difficult although you should have some experience (meaning you own a home) because these aren't for first time investors.