You're absolutely right about the health risks. Additionally, a small oven can be bought online for under $/£/€50 in most countries, and there are many guides o

You're absolutely right about the health risks. Additionally, a small oven can be bought online for under $/£/€50 in most countries, and there are many guides online about modifying these to have precise temperature control for delicate soldering jobs. These modifications use inexpensive (usually <€1 each) thermocouples, along with digitally controlled relays or MOSFETs to do pulse-width modulation.