1031 Flip into a Multi Million Dollar property

So I am looking at flipping my 4 units property into a bigger property. It's paid off, worth around 400k and I feel like I can probably get into a property around 1.5 - 2 million. The problem is that, as with a lot of rental investments, the cash flow sucks up front.

Is it possible to negotiate a few 100 grand off the asking price when they are listing at these amounts? My 4 unit is producing about 3k cash for me monthly so I would want the new property to still out at least that much in my pocket while I hold it.

I am running the numbers though and it doesn't math right. For example, a 1.8 million dollar property. 4 apartments and a restaurant.Shows 175k in annual income. Annual expenses calculated around 25k plus the monthly payment would fall around 13-14k eating all that income up and then some. If they would be willing to come down 300k, I could earn potentially earn the same cash that I am making now, but hold a higher value property.

What do I not understand that you feel I need to consider or look into?

I'd like my next purchase to maintain my current cash flow at the very least while I'm paying off this insane loan. Is that too much to ask?