@Brit F.This was the best and most comprehensive response on this topic i ever read.

@Brit F.Glad to see you prevailed!

Nothing sounds out of the ordinary. 

Because this holdover can affect you and any incoming Tenant, there should be a penalty in the lease.My lease states they will be charged 3x the ordinary monthly rent, prorated per day, continuing through the day the property is returned to me.

Nothing out of the ordinary.

The deduction you get over the time decreases your ordinary income, taxed as the ordinary income at the higher tax rate. 

Your total net income from properties sold in a given year is your taxable income which is typically taxed at your ordinary tax rate.Revenue for flipping is easy to track because it is generally just one entry for the resale value of the property.Expenses get a bit more complicated because you will likely have a 100+ transactions for purchasing materials, paying contractors, & paying utility bills.

A) Rental- Ordinary Income rate B) Flip - Ordinary Income rate + Self-employment taxes C) Sale of investment property  ( not rental) - Capital gain rate2.

Can anyone clarify... for your S-Corp's K1, do you retain your profit as ordinary income (Box 1) or distribute everything to yourself (I believe Box 12)?

My point is, I run operating/active/ordinary income through an s-corp.