Oh Michaela, sorry I see you have the Ga Statue referenced... 

We stepped it up a notch for this bigger home and put in marble kitchen floors (discount from a family member) distressed hardwood, removed most of the drywall, opened up the kitchen to the dinning, turned a 3/4 bath to a full and changed a hallway bedroom into a separate entrance bedroom.  

FHA Reno's (aka renovation loans) do not allow luxury items such as a swimming pool, marble floors, granite countertops, etc.This program typically allows you to down 3.5% of the sale price, while the cost of rehab (materials, labor, and permits) can be built into the loan.  

I've got classic linoleum treads and risers with metal tread nosing and marble top treads with tiled hallways in another building, but that seems like a big project.

Time will tell. these things take time the investigators first figure out their statue of limitations.. 

Don't put in marble floors if every other house has ceramic tile. 

It may also vary from state to state.the state statues are all on line this is so easy to find..

I’ve had the property for 1 year and 2 months now and upon doing some research on Google, statue of limitations Illinois law , I would’ve had to report the issues within the first year.

No matter how much you sugar coat your reasoning for selling in high volume without a license; before a Wisconsin court of law, or any other states adopting similar statues, codes, articles, chapters, etc. its distinctly evident that you, or your LLC if you operate through one, display a pattern of sales that coincides with what the law expresses as being illegal without a license.

instead of tile you will want travertine or marble.