Hello,
I am interested in modelling an area of ~20,000 Sq Km which has a max/min elevation of around sea level to ~1000m.
I'm hoping to print this to size of around A4 sheet of paper.
I have no prior knowledge of 3D Printing but have done limited amount of modelling before using Solidworks/AutoCad. I am hoping to pick up some new skills during lockdown. Once my model is completed I will be sending this to a printing company.

I was following this How To Blog but can see some issues before I begin.

1. Generate 3D Model Terrain using Terrain2STL or TouchTerrain
2. Then complete using TinkerCad

Alternatively on Udemy I found a course called '3D Topographical Earth in Blender 2.8'
https://www.udemy.com/course/blender-earth/

Is Blender another good alternative? Or should i be looking at using something like Autocad for this project?

Thanks