After seeing the following which shares similarity to my suggestion, I visited Amazon to see is a Castor might be recommendable, and then discovered the Castor Design in the Link.
These do look like they cover both requirements, easy manoeuvring and a 'on the fly' Rigid Contact option as well. A little pricey for a Temporary usage but not too much to instantly dismiss them.
Where the footers also win is that a little thought for an added base plate 'if required' will allow for the Speaker Baffle to be taken out of being Vertically Plumb, and be tilted toward the Listener or tilted away from the listener. I have found the best sweet spot when a Cabinet Speaker has a forward lean between 1/2" to 1'.
"I was having to move my speakers around into the room find the best positioning. Started using the felt furniture pads to slide them out on hardwood floors. Worked but to make it easier thought I would try 2” black vinyl castor wheels $30 on Amazon. They are great for pulling the towers into position and I was shocked how well they sounded. Sitting on the small tips of the vinyl wheels with brackets sure worked for me."

