All roller furling
mainsails are loose footed, and there are plenty of them around.
It is ideal for downwind sailing, where you can ease the outhaul and get a good belly in the sail, the same as you would with a boomed out jib
. (Although not as good as a square sail).
The only thing to think about is the bending moment on the boom, which Gulfstar37 rightly pointed out, is much greater than the uniformly distributed load of a hanked on sail. If the boom bends visibly, you need a stronger boom.
You also need to make sure the outhaul sheave or block is strongly attached to the end of the boom.
If you are not roller furling
, when reefing you need a secondary block located along the boom to haul the clew outwards after shortening the luff.
I converted my three booms to loose footed with no problems at all.