Thank you all sooooo much for the responses!!!!!!
This dialog is just what I needed. I am totally capable of researching and building a thing once I know what the known's are but here I have been completely out of my element.
I am printing PLA in thin pieces no thicker than 8mm .2/.3 mm layer height
For this reason I started out thinking I should make a cartesian printer.
Also for the base plate I figured I would do dual, belt driven nema motors.
Not sure about heat yet since I technically don't need it to stick to the base and with long print times like a month It would be nice to avoid making all that heat and using electricity if possible.
I looked at the hang printer and was all about it for 5 minutes until I saw the high mass and torsion of the print head will not allow it to be detailed enough to do what I need it to do.
Black belt looks like it could do exactly what I need but holy smokes looks very very expensive.
If I slice files in Simplfy3d will the Reprap software on the duet read and execute it properly?