Also, you are paying ordinary tax on commission income (1099 ) but saving capital gain tax on the commission expense.

However, if your high income makes you ineligible for the net passive loss allowance, using your ordinary income rather than rental income to make rental property repairs will not reduce the tax liability on your ordinary income. 

Also, even though my tax basis will be lower which means higher taxes for me when I sell, it would be treated as capital gains instead of ordinary income. 

There may be some risk if you foreclose on the property and the property becomes yours.From a tax perspective - holding tax liens likely won't generate ordinary income that is subject to self-employment taxes; which negates some benefits from an S-corp.

I personally am OK selling flips and paying ordinary rates when it makes sense to avoid market and tenant risk.

You're looking at ordinary income rates and, possibly, self employment taxes.

It's an ordinary lease for a shorter period of time.

So...I had the idea of installing a concrete pad in my back yard, sprucing it up with a privacy fence and maybe a patio and parking my camper there! 

Just keep in mind, flipping produces ordinary income which is taxed based on your tax bracket.

But there is a limit to how much you can exclude from ordinary income.