How and what should I feed my fire bellied newt?
The number of smoke detectors is not determined by square footage, but by rooms. You need a smoke detector in a hallway which gives access to bedrooms AND in the bedroom itself. You also need a detector In any room that opens into the hallway that has a ceiling level, at any location, 24 inches higher than the lowest ceiling level of the hallway. (Building Code Section 907.2.10.1.2.)
Silver melts at nearly 1000 degrees C (961.93C). You will require a high temperature crucible and a strong heat source. Fire insurance might also be a good idea.