Katie,
That is one of my coops (chicken math!!!) and easily the most expensive. I snagged it on Craiglist for way under half price. I'm sure all my other girls are jealous of the six pullets who live there (especially the three older hens who had to move out so the youngsters could move in).
I used to have plecos, but mine never reproduced. I had a lot of cichlids and used to sell the convict cichlid babies to the local Earl May store -- or trade for more tropicals! I loved having all kinds of tropicals, a hobby I inherited from my mother. Saltwater always seemed too technical for me.