Rent rates and purchase price can be adjusted if the option is renewed/extended at that time.

So many piling on I need to adjust. 

It's going to be about  the facts of the case.But my guess would be that your accountant can separate that area out and allocate a certain % to investment use - and depreciate and allocate expenses and adjust basis accordingly. 

Many of them have several large screws that allow you to adjust the height of the threshold.

Maybe adjust the deposit to offset the risk? 

Not only the equation, but programming that equation into the system so it adjusts the starting temperature according to the current gas and electric rates.)Before doing any of that, I'd make sure the low-hanging fruit has already been picked- LED lighting, water-efficient fixtures(sinks, toilets, shower heads,) possibly spray-foam insulation to reduce drafts, to name a few.MG

Independent Insurance Adjusters, Equifax/retail credit bureau and an actual Home Inspection Services in the DC area.

The purchase price + capital improvements - depreciation taken = your adjusted cost basis.   

Adjust your life style and start saving.

For purposes of the example, assume a 600k adjusted cost basis.Would you exchange out of the $900k portion but pay tax on the final similar to an installment sale.