We used http://www.rabbitcondo.com/ as a template, but we made some modifications (we didn't add that small top shelf). Building it isn't really hard, but it does take a lot of time. We did it in like 3 days, so it'd take about a weekend to finish. There's a youtube video on how to do it and that helped. It's worth the work though, the ones I saw you could purchase were like $400 for that size, we built ours for like less than $200. You definitely need two people though.very cute bunnies!! I love your condo, was it hard to build?