If you have any interest and access to some basic tools you could build your own printer to meet your own specs.
If you don't want such a big project, you could buy a machine that has adequate XY range, controller, etc., and then just extend the Z axis to whatever length you need.
As a point of reference, I built UMMD for about $1200 all-in, IRIC, but I shopped carefully including getting t-slot for the frame from a local scrap yard. It has 300 x 300 x 695 mm print envelope, heated enclosure (50C) to print ABS, coreXY, Duet3D controller, heated cast aluminum bed on kinematic mount lifted by two belts driven by a single, worm-gear dive-reduced NEMA-23 stepper. The bed does not move when the power to the Z motor is cut/lost, so theoretically, prints interrupted by power loss can be resumed. There is no autotramming- it's not needed. The bed doesn't go out of tram once you set it manually (two screws, 1 minute). See the link in my sig, below.
Ultra MegaMax Dominator 3D printer: [
drmrehorst.blogspot.com]