Oh, i was gonna make one more note about $$$ ... you said $1000 for your machine. Be cautious here because rigidity and reliability come at a price. I haven't been keeping up with the current machines lately but I'm a little dubious about how much machine $1k will get you.
I'm amazed my machine is still holding together and I've got about $1600 in materials into it. It's not quite as rigid as I'd like but so far it's been reliable. My machine has a 28x60 cutting surface and a 3" overhang on one end so i can machine the ends of boards up to 40" long. I wouldn't count my time in building it at 100%, though, because I was also fabricating as I went, too - using my limited capabilities and whatnot. With my current machine making parts, I could easily build a copy of this thing in half the time.
I don't mean to rain on the parade with the financial side of things. But if you're gonna rely on the machine for business, I would look at higher quality machines and I don't believe many are offered at that price point. The quality of the vital components (linear guides, drive system, spindle) are going to directly affect the reliability of the machine. If you want a machine that can do at least 24" square, I think you'd be hard pressed to find a solid performer that's up to the task of running for 6-8 hours a day several days a week and I would urge you to consider at least $2k for your machine if you aren't building it yourself.