bigone5500......Did you try a google search for "DIY reflow oven" ? There are several different options and at least one open source Arduino project.....I don't have a link, but a friend of mine recently ordered a "kit" (pretty sure off ebay)....had all of the various components listed in the open source project + detailed step-by-step instructions ..... My buddy managed to get it all up and running and he is pretty much clueless abut electronics (so why did he need a reflow oven? LOL, long story, but he needed to populate ~2500 SMD PCBs that I designed for him for a product he is MFG/Selling....) Anyway, it takes a bit of "fiddling" to get the heat even and figure out the the best timing cycle, but with a bit of experimenting you should be up and running in pretty short order....MAKE CERTAIN to pay attention to the oven specifications for the one you decide on....I don't remember exactly what it was, but there was some specification about the oven that narrowed the choices considerably....
Oh...one more thing....he found Lead/Tin paste worked much better....so if you aren't shipping to California or otherwise don't have to be RoHs compliant then I would suggest you start with Lead/Tin Solder.....My buddy has also mentioned that the Stainless Steel masks are MUCH easier to use than plastic or DIY....they aren't expensive if you get them done with your boards (I think he told me the Stainless Steel masks cost him ~$10/pcb...)
Good Luck!
Fish