1000 splogs are easier than 3 blogs if you use kaktusan's Blogs Organizer & Gallery Scraper software. Plus use subdomains since they're treated as separate websites. I'm not sure link trading, except with yourself, is much of an asset if your network is big enough.
If you own/buy generic domains you can get real creative with the naming convention of your subs.
Just my opinion
kaktusan's website,
www .cheapestadultscripts.com/specials.html
Scroll down, look for "Auto Blogging Suite". (n00b - I can't post a real link!)