Actually, it is possible do structure a 1031 Exchange on the sale of one or more relinquished properties and then using the proceeds through the 1031 Exchange to construct improvements on real property you already own.

This of course will affect productivity and delivery schedules. 

I'm also seeing lots of homes for sale that were used as Airbnbs, so I'm wondering if that along with these numbers may indicate it's an overly saturated market, and if these are signs that maybe I should keep searching for a stronger market, or just a property that cash flows given the average annual revenue?

The homes don't have MLS sale history until they are listed after the rehab has been completed.If you don’t mind shaing, how are you financing your deals and do you do the work yourself?

(The Black Friday sale on the Bigger Pockets bookstore was where I did my own Christmas shopping so my family knew what to ‘buy’ for me!).

Comps wise look under 1 mile and the past 6 months for sales.

What is the current market valuation of the property based on comparable sales (defined as similar properties, within a 1-mile radius, within the last 30 to 180 days, that are within 10% of total square footage)? 

The Due On Sale clause was added I think in the 1980s because of "sub-to" deals.

BUT I have also heard that it could trigger a due on sales clause, bringing the note fully due at any moment.

Look, we’d all like to search the internet, find a deal for sale, analyze the property as having a great cash flow at current interest rates, with lots of upside potential in a gentrifying market.