Plans are in place to build a stackable duplex with two 960 sq. ft. units (2 bedrooms, 1 bath each).

The 0.75-acre parcel provided the perfect foundation for a larger development plan, including 12 patio homes and two duplexes.

My initial thought is to invest this into the stock market (Amazon, Tesla, Google, etc...) and keep doing that for the next two distributions as well, ultimately pulling it all back out, plus the earnings (hopefully) in 3 years time to purchase a house.Based on the plethora of experience in these forums, does the above sound like a good plan? 

I agree, that's what the plan is right now.

The build-out also includes plans for a wellness and fitness center and an event space, creating a dynamic, multi-use property in a high-traffic area.

The build-out also includes plans for a wellness and fitness center and an event space, creating a dynamic, multi-use property in a high-traffic area.

The build-out also includes plans for a wellness and fitness center and an event space, creating a dynamic, multi-use property in a high-traffic area.

I have my license in the state of Colorado, and am planning on getting my license in Illinois since its reciprocal.2.

I plan to put down $100,000, leaving a seller-held mortgage of $150,000 at an 8% interest rate with a 3-5 year balloon payment. 

This property showcases strategic planning and flexibility within my investment portfolio.