If your rental income increases faster than inflation, you will have the additional dollars you need to pay inflated prices.

Utah has some of the cheapest tax and insurance rates, but their rent to price ratio is horrible and rents don't keep up with housing increases like they do here. 

As home prices or interest rates increase, fewer people can afford to purchase homes, forcing them to rent.

There are some locations to stay away from but almost every single sub market of KC has value and increasing rents.

This is becoming more true for government employees clearly given the recent "Use It" act which will require 400,000 government employees to go from a remote to a hybrid role which started in January of 2024 and will continue to ramp up as time goes on (Source 1, Source 2)This trend will continue as companies realize more increasingly they need to be at least hybrid to be competitive.

However, I’m increasingly excited about starting a unique stays/glamping business.

Will you have cash flow on day one or do you need to increase rents or find better tenants? 

The demographics and map data don't take the students into account, but they're really what's driving the market.Low property values and ever-increasing student rents are a recipe for a market when you can pick up a duplex in decent condition for $150k, and rent it for $500/bed (that's an EGI of $36,000 annually for a 3/3 duplex).

As a result, you might end up increasing your taxes by delaying income and accelerating deductions.Did I miss something?

There is nothing illegal about Subto when it is done legally, as you infer.Actually, Due on Sale is a result of banks calling loans due back in the 70's and 80's, simply because interest rates had increased and other spurious events like that.