@David Rawls and @Jared McCool,There also exists a program for veterans to house them near where they receive treatment for physical and other disabilities.

Inventory implies an intent to resell and that would make your property ineligible for 1031 treatment.  

We had a filtration and light treatment system.

Several reasons to rent to own prior to financing:  1 tax code, you can only take installment sale tax treatment of seller financed sale if the property was an investment (rental), 2nd is long term cap gains, 3rd is check out the tenant for reliable payer...  

I did 28 sessions of radiation and chemotherapy before surgery in hopes of shrinking the tumor to save my sphincter muscles from the tumor, so after all that and 6 weeks of healing I went to meet the specialist for colorectal surgery, he looked at all the tests and scans that was performed before and after treatments, he gave me two options( option 1 was a permanent colostomy which I said I'm not in favor of, what's option 2 i said?

The banks get special treatment and are responsible for much of this country's financial woes that hit the middle class the hardest.

More preferential tax treatment.

If you two do not have direct ownership, then generally you and your sister will have to recognize gain equal to the sales price of the property less the adjusted basis of the property and depending on the depreciation method rules you may have to reclassify some of those gains out of capital gain treatment.

You may choose to reinvest in other properties but either way there would be no tax.If that property is your primary residence it is not eligible for 1031 treatment.  1031 exchanges are only for investment property.  

You may also need ozone treatment.