Aoyue 968 + Presto Griddle (as a preheater) + k type Thermocouples 2 sensors + nozzle +jury rigged air wand holder
That is the standard cheap method.
But for under 200 I guess you can get a aoyue 850 or something cheaper KADA(?). Nozzle 38x38mm should work for gpu/cpu.
I had the aoyue 2702 that broke down on me and I've been using a 968 recently, the temperature readout is not accurate at all on my 968. I'm guessing you can adjust it tho. Thermocouples are also a must to monitor the temp of the top and bottom of the board and to obtain a good reflow.