How's the ventilation for reflow fumes ?
Dungeon has a vent into the car park, fresh air is pumped in 24/7 from external location via ducting.
The bigger bunker does not have a vent, but does have external fresh air pumped in. Could drill a hole through the besser block wall and install a vent though, I doubt anyone would notice.
That would be fine - for the odd board or two you can get away without ventilation if you don't mind a bit of a smell, just avoid "incinerate" mode! A fallback timeout on the oven is highly recommended.
I use a Sanyo toaster oven on a variac, run at about 60%, a kitchen timer to prompt me to go watch it after 4 minutes and turn off when flowed, and the internal timer on the oven set to 6 mins as a fallback.
You ideally want an oven with elements top & bottom, a nice big window, and a tray that comes out as you open the door.
If I had to replace this oven I'd probably look at something with a circulation fan.
For larger boards I have a commercial pizza oven which I modded with a homemade hinged door with some stove glass