I owe roughly $75K.I found an off-market, 6 unit deal that is owned by a customer of mine i'm interested in purchasing.

However, as this is my first time pursuing such an investment, I am uncertain about how quickly these properties can be sold after purchase.

They are inexpensive, they usually come with mineral rights (big plus in Texas), they typically have short redemption periods, low rehab costs, and sell quickly at the right price; they also have large ROI. 

Quote from @Jay Hinrichs: I invested in a winery/wedding venue at the end of 2023 because I needed a quick tax strategy and couldn't find a property fast enough.  

.- Would you be requiring custom changes often to your digital workflow?

I recently came across a piece in Forbes talking about how quickly rental dynamics can evolve when population growth spikes.I’m based in Phoenix and have been in the real estate game for three decades, and a close friend of mine recently reminded me how the right connections can shape your entire strategy.

It's always worth checking recent reviews to ensure you're getting someone who can move at the speed you need.A quick Anecdote: I had a friend who went through a similar process recently.

You'll be able to meet quite a few very quickly that way.

If they do not respond quickly when it is for rent, are they ever going to respond if there is a work order or some other problem?

As you mentioned, it might be difficult timing the sales of each of properties where you can achieve a combined exchange (multiple properties into 1 property / or a few properties).Just a quick note that may be helpful - I work with a group of investors that can help with a combined exchange into a single property and will buy it back once you've found a replacement propertie(s) as the final destination for your capital.