4 unit rental with commercail vacant

[Dan Mann]

I am looking at a rental in my area for $125,000. It has four units currently being rented out and a 5th unit that is storefront and vacant. It has a current annual rental income of $33,000 and $2,750 per month. The numbers work out really well. The question I have is if there is any red flags with having a commercial storefront being the 5th unit of this property. Will this make my taxes more? Will this lead to more issues down the road that I do not know. Thank you!