Pros and Cons?? HELP?

What are some pros and cons for the following (keeping in mind that the items are suppose to be suitable for a school environment): e.g. a shade cloth – pro: covers large amound of area.. con: expensive.. 1.. a handball court 2.. solar panels 3.. outdoor solar lamp (e.g. con: easy to steal, etc.) 4.. concrete 5.. ivory pavers 6.. tiles thanks.. all answers appreciated =] (oh and sorry if i posted this in the wrong category… i wasnt sure where to put it?)