I wouldn't. I'd rather put that time into my fulfilling business. After a year of such extra effort, it'll probably make more than $2000/month difference in my bottom line; though that assumes I have a real business to invest my time in, and that I can afford to work for a year before seeing that $2k (or more) show up.
I have my doubts that yet another generated content spam site would be worth $2k/month, though I'm sure there are a few...I kinda suspect it'd take months of experimentation to actually find one that pays, and keeps paying over a long term. If you only get one $2k month, and it drops like a rock soon after (either after competitors sweep in and rejiggle the same data, or after the data becomes stale and needs more human intervention to update).
Also, ew. I'd feel gross if I were creating spam for a living. I've come upon this kind of site quite a lot when looking at government auctions (which admittedly have horrible sites, when provided by the government), and the level of spam in the industry is just disgusting. Everybody fighting for the same keywords, clogging up google results for the real data, always out of date, often pointing to no-longer existent goods, mingling many types and branches of government (each branch has different requirements for buying from a government auction; even if you qualify to buy at one, you may not qualify to buy at several others) to beef up their listings, etc. When done poorly, it's evil, plain and simple. A low-grade evil, but evil, nonetheless. I don't want that kind of thing on my conscience, and I don't see how anyone could do it well on a few hours a week or month.