For such small quantities learn to do it by hand if you can't afford the machines. The experience you gain learning to hand temper will pay huge dividends going forward. In the end, machines can only do what you tell them to do. If they don't produce correct results and you don't know what tempering looks and feels like then you are not in a position to know why the machine "failed" to temper properly.
It's not the machine's fault, actually. They are not artificially intelligent and cannot read your mind or evalaute the chocolate they are being asked to temper. They don't know the external temperature, or humidity, or anything like that. So they can't react to changes in ambient environment, for example, that will affect temper.
Finally - and I really don't want to dissuade you from pursuing your chocolate dreams, at this stage if the difference in price between a Rev 1 and a Rev 2 is straining your budget then wait and save until it's not an issue for you.
clay - http://www.thechocolatelife.com/clay/