multi family home

[Shequann Burrwell]

my mother and law is looking to buy a 3 family home. she found one that she wants and we went and looked at it. its a for sale by owner and the asking price is $359000. I did all the research on the home and town records show the house as a 2 family and other real estate site show the same. we obtained the floor plans on the home and its is indeed a 2 family home that was turned into a 3 without any records to the town recorded. the extra kitchen and bathroom are also not legal. there is a business on the property as well that functions as a tow company that is legal. not i looked in to loan and a traditional loan would not be able to be obtained since the business in included in the deal. will i run into any hurdles when it comes to buying the home with the illegal extra apartment and what type of loan should look into getting since the property is considered multi-use?