The Jenken kilns are very reasonably priced. I purchased my Fuse box II about 10 years ago and it was almost $900.00 back then. Bead doors are great and I have two four inch bead doors in my kiln and wish it was bigger.
My next kiln will be a Paragon with the door that I can raise easily to any height I want. We used them at Eugene School of Glass and I knew it would be my next kiln.
I would buy the best kiln with a controller I could afford with the largest bead door.
It might be a little large but you will grow into it.