Buying 5BR house-renting out rooms to 5 unrelated tenants

[Jim Smith]

Thinking of buying a 5BR house in the city of Philadelphia and renting by room to 5 unrelated young professionals

The house would be 3,000 Sq ft new construction and meet all forms of habitability

Now here's my question - assuming more than 3 unrelated persons in a house is a code violation and worse case scenario that neighbors call or tenants for some reason call L&I

1 - what is my potential exposure with the city.  I'm assuming a small fine (in relation to what I'm collecting in rent).  Could they possibly make me kick people out?  Or since the house Is so big and fully up to code let it slide.

2 - on a legal front, could tenants get sly and say that the lease (everyone on separate room agreements) is actually not valid and try to sue me for any back rents  that were paid to me