jwhoneycutt,
I believe Bob does not serve single file Wikis. TiddlyServer will, but the install is a little more complex and configuring the settings.json file to point to your tiddlywiki folder a little fragile. You could import your single file wikis into bob folder based wikis if you want, but I am not sure what your expect bob to do for you. For me one value of bob is not so much multi-user but multi-access, ie I can keep tiddlywikis closed because if I open them more than once the change will be reflected in both tabs/windows and I will not overwrite my own work.
I would suggest if you are happy to use FireFox or Chrome and only use single file wikis you obtain the Timimi plugin and install that and your Tiddlywiki files will all be savable when accessed on the file system from either of these browsers. Use TiddleyServer, Bob or NodeJS if you want to serve wikis over your LAN
On the other hand TiddlyDesktop (linux/mac not sure) is a good way to access file and folder wikis and build your own "menu of wikis" from one installed application.
I am not sure you will be able to "search" all your TiddlyWikis from Bob as you imply. With Timimi you could use the Operating system search to find wikis holding a string and then open them in the default browser. I prefer to organise my wikis so I know which one to search for what, I have an index/directory wiki to support this.
Regards
Tony