The properties that we turn into rentals, we just swap out from gas stove to electric stove or back as needed.

Swapping out air filters, checking fire extinguishers and smoke detectors, getting systems ready for winter/summer, checking water softener, replacing water filters, etc...If you're out of state then the travel may be deductible if it's primarily for business.If your properties are in Denver then you'll need to get them inspected this year or next as part of the new rental legislation. 

Your original post is simply about your desire to swap one term for another that you find less offensive. 

When you connect old to new there will always be a potential fail point at that junction.....was that junction within the scope of work they were hired to swap out?

Have the AC checked out and rehabbed if needed.Ask her if she wants new living room and bedroom carpet, if so, apartment tan.Paint the walls inside if she would like that.Take her drapes down and take them to the cleaners for a spruce up.Redo the exterior paint to a modern color, and keep an eye on the roof.Have the yard spruced up if it needs it, plantings cut back, trees trimmed.Since she is a friend of the family, I say make it nicer place for her, since she was so nice to you.I would probably leave the kitchen alone, other than a new vinyl floor.And swapping out the bathtub for a walk in shower might be a lifestyle enhancement for her (with ADA grab bars).Of course you don't "Have" to do any of this.

Then it's easy to swap it out with the hot new device on the market. 

I'm with @Corey Conklin on this one.At face value, sure take the add'l $900 and swap tenants. 

(Swapping a $400k home to a $700k home costs $300k btu fi they both drop 10% it’s $360k to $630k, I save $30k, actually a little more with selling costs and other transaction costs.) plus with high interest rates I have less competition on the higher priced properties that are hurt more by higher rates. 

You can sell a property held for business or investment purposes and swap it for a new one that you purchase for the same purpose, allowing you to defer (not totally avoid) capital gains tax on the sale.Proceeds from the sale must be held in escrow by a third party, then used to buy the new property; you cannot receive them, even temporarily.The properties being exchanged must be considered like-kind in the eyes of the IRS for capital gains taxes to be deferred.If used correctly, there is no limit on how frequently you can do 1031 exchanges.The rules can apply to a former principal residence under very specific conditions.45-Day RuleThe first relates to the designation of a replacement property.

For example, if you buy a performer, Dave has a program where he will swap you out of the note if the note goes non-performing.