This is a tough one. 

But really the only info out there on them is marketing material (I'm talking to you Brett!).

That means no HOA neighborhoods, which rule out many places.  3bedroom might make it tough to work, unless you're sleeping in the laundry or garage and renting full 3bedrooms. 

And juggling that alongside a full-time job is tough.

This is my 1st post and I am so incredibly thankful that a forum like this exists and for any information to help guide me through this tough decision is so immensely appreciated! 

Not impossible but it would be pretty tough to get an STR property approved unless you are an owner occupant.

.- 2 floor ADU is expensive and is tough to do due to the height limit.- Most people kept their ADUs under 750sf to avoid the impact fees- For subdivision, it wouldn't be applicable in your case due to your lot size.Feel free to reach out if you like to discuss in details.

Are you estimating that building will be more profitable with the higher material prices and the added challenges of getting a certain type of financing together with the time constraints to minimize holding costs? 

Current rates make it tough for any house with a new mortgage on it to cashflow. 

Denton is just tough to find the right ROI/Rent/Price ratio.