The question is basically in the subject already: What reflow oven is "the standard" for hobbyists on a budget in late 2019?
About 12 years ago, I got a P&P machine, and dived into the world of reflow. i got the biggest toaster oven they had at Wal-Mart, it was a GE model.
It has 4 "cal rod" elements, basically steel tubes with resistance elements inside, running horizontally, two below the rack, two above, parallel to the front
door. I got an Omega ramp and soak thermocouple controller on eBay. These are a bit expensive to buy new. The ramp and soak feature allows you
to put in a multi-step temperature profile, with temperature ramps and holds. I added a solid state relay to control the heating elements, and that is
controlled by the Omega controller unit.
The trick was that I had to poke the thermocouple into a plated-through hole in the PCB to pick up the temperature. Sensing the air temperature led to
badly burned boards, as the board absorbs most of the IR from the heaters. It only took one fried board to figure out that trick.
I have done over 2000 boards with this setup. It takes about 10 minutes/cycle, and I can load 6 or more individual boards in the oven at one time,
depending on size.
I did luck into a 1000 foot roll of miniature thermocouple extension wire on eBay for a song, so i have a lifetime supply of thermocouple wire.
I've only had to replace the thermocouple a few times when it got too close to the heating elements and the insulation melted.
Jon