For these reasons i am confident you do not need an account per unit as having that requirement would be crazy complicated (the opposite if kiss).in addition, how will anyone know that you are not following the law?  

It gets complicated if you use a HELOC towards two separate projects as you would need to pro-rate the interest across the two projects.However, the answer would be yes, they would be deductible.

@Isla Arshad Evictions are not complicated in North Carolina.

The Title Holding Trust or Land Trust will keep your name of the public record, but it can also complicate the property ownership and management. 

They are not complicated ordeals.

This stuff doesn't have to be complicated.

And I totally get what you’re saying about finance people—they can make things feel so complicated!

This will allow you separate business income and expenses from personal income and expenses.Since you plan to house hack your bookkeeping and tax return preparation will be more complicated because a percentage of your home expenses will be personal deductions and some will be business deductions.

It's only as complicated as you want to make it. 

You get to live in a property you own for free or almost free, while learning the ropes of being a landlord and you get very very favorable financing, where you don’t have to worry about finding private lenders or getting into any complicated or exotic investment strategies on your first deal.