Hey, I'll be the first to admit that arranger players are few and far between in most parts of the US, and that's a good thing.

In my part of Maryland, I know of a half-dozen, and every one of them has more work than they can handle. The bands and DJs, well, they work a few jobs a month - THAT'S IT!
When I was doing weddings, most of the locations I worked had their own announcers and light show systems, and most of the light systems could be operated either remotely by an individual at the console, or interfaced with the music output and timed with it. I never had any trouble keeping a dancefloor packed to capacity and keeping the action going nonstop. There are lots of lounge players that I knew said they could never keep up that pace.
As for one person doing ALL the singing - well, if the singer's good, then it has never been a problem. However, if the singer is marginal at best, it's DJ time!
Sure glad I'm semi retired,

Gary
