For the record, I would trust both my co-mayors with /t delete. However the difference is, with /t withdraw, it's like having someone work around the nuke, and could indirectly launch it. But if you give them /t delete, it's like just giving them the launch key. Only a set number of people need /t delete because regardless of trust there should be only a set number of people to ever use it. Leaving it out isn't an issue of trust, but an issue of liability. ...
Also to note, just because a co-mayor can withdraw, doesn't mean the money is his in any way as well. Legally, the town is owned by , and all bank funds within the town also are owned by . While assigning a co-mayor is an automatic grant of usage to those funds, it is/should be assumed withdraws are for town-use only. Withdraw of town funds for personal use(embezzlement) is clearly abuse, and illegal(theft). That warrants a removal from co-mayor in the lightest sense, to a ban in the harshest.
Thanks, Deinen, this explained it well. The paragraph about the money in the town bank not actually belonging to the co-mayor helped something click for me. :)
There is already a Builder rank which can build on any unowned (I think) plot in a town.
I think recruiters should also have the ability to put plots up for sale. What's the point of recruiting a player if you can't give them a place to stay?
~ @Squid53214
A suggestion to do this was recently accepted, along with one to give Builders the ability to destroy (not just build). I'm not sure if they're completed yet.
+1, Also, maybe also make it that the builders can be part of another town as sometimes, people have to quit their town to do a building job in another town and then rejoin their main town, which can become a hassle especially if the builder has a high rank in their main town.
~ @Skwisher
Players with town ranks can only be members of that town. It doesn't make sense to allow otherwise and probably wouldn't work with the Towny plugin.
That said, you can do what you're describing (allow certain players to build on certain plots) with town and plot perms. :) They're confusing and a bit limited, but there's a great guide to them here. (Edit: If it's a limited-time project, setting embassy plots for the builder will give you more flexibility. That doesn't work well for ongoing projects, though, unless the builder doesn't mind owning the plots - and you don't mind either.) http://www.meepcraft.com/threads/theeditsons-guide-to-towny-perms.690/