Speaking from experience. I have only printed PLA once and it was with the Stratasys. I bought 25 metres just to see if it would print OK. I don't use PLA as I prefer ABS but had to try it.

The bed is heated by the chamber. It is not possible to have a cold bed and a heated chamber unless you have refrigeration plant on the bed.

Suggest you buy a Stratasys and try it.

A significant number of people use PLA in place of the Stratasys support material as it is cheap and will dissolve in D-limonene.