This is a model of a simple teepee, designed in OpenSCAD and while not yet customizable, it is parametric - providing internal variables for most of its attributes.

I have not yet printed this version but I'm in the middle of printing the last version of this file at full size (just over 106mm) and it seems to be printing well.

Started with a cone, subtracted from it a slightly scaled down version of the same cone to make it hollow. Then lopped off the top of the cones on an angle to create the vent smoke vent,

I then intersected to cylinders to make a cat's-eye shaped entrance hole and created a bunch of spars shooting up through the vent from the ground to create the appearance that the spars are supporting the wrap that makes up the teepee's walls.