Rethink your approach and have a realistic construction cost.   

And that's even using the high rent estimate, a low vacancy rate (8% would be more realistic), and a very low property management expense (10% of rents is pretty standard), just for starters.If you personally were going to live in this property, it would likely be a slam-dunk...... but, as an investment, it's a money-loser!

Nothing in what you proposed is realistic.

quick question(s): how realistic is it that you will stay in this primary house for a substantial period of time like 10 years?

Is this a realistic concern?

-Commercial vacancies remain hard to fill-We are on pace to do the least number of transactions this year since I started REI in 2017.Not trying to be negative, just being honest and realistic.

For your townhouse scenario $3000 rent is definitely on the high side, for the most part $2300-2500+utilities would be more realistic (generalizing).

It requires technical knowledge yet is super adaptive and open source and once controlled, you can easily scan sketches of ideas and convert them to realistic renderings.  

Builders and developers are increasingly turning to leasing as an alternative when they cannot sell homes at their desired price points.To succeed in this market, sellers need to be realistic about pricing and be prepared to make concessions.

It’s not just about being conservative—it’s about being realistic.