If the property you're thinking of tapping into equity for is the one you listed, you bought for $495 and you owe $450 on it, unless it has appreciated quite a bit I don't think you have enough equity in there to pull from. 

Take Nithin, for example—we recently featured him on our YouTube channel, where he shared how he’s now pulling in $25k+ per month.

Also my advice would be to not think it's a loss if you don't pull out 100% of your funds on the refi. 

Hang your new fixtures and replace the knobs and pulls.

It's my experience that having those types of leases creates many more management headaches because the students/roommates can pull you into their drama much easier. 

.- Immediately refinance the property with a traditional bank mortgage to pull out a significant portion of equity. 

If the pumper pulls out inappropriate material you can address with tenant. 

Out of the 20 letters I've sent, I've had 1 guy get back to me and we were in discussions but weren't able to find a price that worked for the both of us.The issue is that I only have a few houses on my mailing list so far (just places I've walked or driven by that caught my attention), and blindly searching every street and address # to see which houses are actually legal multifamily will take forever and doesn't seem efficient.I know the data is publicly available, I just don't know how to aggregate it in a way that would be efficient and useful for blasting out marketing mailers.Are there any websites that can pull massive lists of all multifamily houses in my area?

If you are buying it using seller carried you might be able to use a HELOC to pull out some of the equity but not sure how the refi.

If they try to pull that ESA crap, let them know that all animals have to follow the rules legally and that just because it is an ESA they are not magically exempt.