Makeshift SMT Station. Any suggestions?
The hot air guns are good for reworking a single component or two, but not a good choice for entire boards. I've soldered down QFN components using one, you have to be careful with airflow and direction, and/or use a pick to hold the component in place as it reflows, but I've hand soldered all the remaining 0603 package components. Any chip that isn't leadless can be hand soldered, even with fairly fine pitch, you have to develop a technique of dragging a solder ball across the leads, and the surface tension of the solder/solder resist between the pins usually results in no bridges.
   To reflow an entire board, there are a few projects that can be found on the web about converting toaster ovens, I bought one, with a convection fan for $40, it's fairly large, it does 12" pizzas with a fair gap at the sides, so a 35cm board should fit. the hacks only involve replacing the thermostat with a controller, but for a one-off it'd be possible to manually switch the heaters on and off to approximate the profile needed.