I read an article in "Elector" magazine a little while ago.
I dont think I still have the magazine.
The writer used a £20.00 tabletop oven.
He got a good result without any modification except having a temp probe on his mutli meter.
He made up a metal tray to hold the pcb and clamped the probe to the board.
He put the board inside and turned the oven on with both the grill and oven elements on.
He turned the oven off just before it got to the upper temperature and let it cool.
The temperature curve was pretty much spot on.
With that particular oven you would just need a temp probe and controller to turn it off.
So its still worth looking into.
I havnt got to the stage of smd components yet but I would give this a try when I do.
Gordon