I pay them a very nice bonus at the end of the year, so realistically it's probably more like $35/hr, so my labor cost for the job would be around $7,000.   

Quote from @Melanie Baldridge: Newton's law of tax: What goes down must come up.Everyone enjoys the sweet benefits of bonus depreciation, but what happens when you sell?

Look at the comps in your market, having extra storage is a bonus so as long as it has working electrical I wouldn't spend much time or money on it other than making sure it's clean for showings.

I think that it is a bonus to have your own domain email, however, I think it is fine to have your name @gmail.com.

The seller converted one of the garages into a bonus room and it added 300sqft under AC.

Taking bonus depreciation early is a tax deferral, not a tax savings.Recapture is real and debt must be repaid!

Well I knew I could subdivide or I knew the density bonus's applied etc etc.

The #1 way real estate investors defer taxes to later dates is with a system called depreciation and bonus depreciation.Depreciation is the act of slowly, over time, deducting the initial expense of an asset against your taxable income.Generally over a 27.5 (residential) or 39 (commercial) yr time frame.So each year you can write off a few percent of the purchase price against your income. 

If it isn’t a “bonus” situation listed below I wouldn’t do it as a seller, even for 12%. 

If you are not a real estate professional and bonus depreciation is limited to 40% starting Jan 1, the tax benefits are going to be pretty minimal unless I am missing something.