I purchased this property with hard money lending to close the transaction 2 weeks back.

It is still possible to have a positive cash flowing property but you have to be smart, run the numbers and hunt for the right deal.

You can only do it in certain zones.Here is where you can read up -https://raleighnc.gov/permits/services/short-term-rentalsAlso, you won't get any extra appreciation over a similar long term rental.

You can live in one UNIT or ROOM and renting out the other vacant units/rooms to offset your monthly mortgage payment.There are several ways to run and make sure you are maximizing your rental income while keeping your living expense as low as possible.

@Heather FultzCondos can have the advantage of the maintenance of the outside taken care of but can run into issues with HOA and restrictions on STRs that you can't control. 

The short answer:No need for an LLC with a House Hack.

Any suggestions on a finacial app for my short term rentals?  

I see that quiet title actions can run $1K - $5K depending on the situation, so it would be wise to factor this into the decision-making process. 

Also, is no money down really something that is possible?

So you still have to spend the time to run all the comps yourself and validate the property with the construction team.