Love the Bridgeport. I have somehow resisted the temptation to convert it to CNC.
Another reason I love it is that I use my garage shop in mentoring a group of kids at the local high school robotics team. Nothing like making parts on a manual mill and lathe to learn about the real world of "just 'cause you can draw it in Solidworks it doesn't mean you can make it that way". One of my favorite moments to witness with the kids is when the make two parts that are to be bolted to each other and they can't. The holes a don't line-up and the hole diameters are not what they expected. What follows is a chat about Geometric Dimensioning and Tolerancing (Light Edition). Fun stuff.
That said, back when I was still bootstrapping my business in the garage I reflowed SMT boards with everything from toaster ovens to hot plates. I have to say that my favorite budget reflow tool back then was a hot plate with a really thick top. There are some that have a metal cover box that will make a little oven-like environment. None of these are 100% reliable, of course, and a lot depends on the nature of the board, size, type and mass of components, etc. What you do get is precise temperature set points.
I'll see if I can ask our manufacturing engineers tomorrow and see if there is such a thing as a cheap lab-class reflow oven that does a decent job. It isn't going to be $200, I can tell you that much.
Want a business that's machining-based but needs better software? Design and make injection molding molds automatically. Injection molding is incredibly cheap per unit, but the molds cost too much (average is around $12,000) and may not work right the first time. Mold design requires highly experienced mold designers.
Make that process easier. Be able to start from 3D printer type models. Advise the naive user interactively on how to modify their part for easier injection molding. Figure out all the flow and cooling and release stuff automatically.