Those pendants are actually switchable, 8ohm (normal) or 70/100v (commercial, usually for things like lots of speakers on one line that have individual volume at the speaker), that was one of the bonuses, could work with whatever may have happened to be around if not starting from scratch.
When using them, I suppose you could do left vs right, we rarely did that except in a couple particular rooms and usually just used a mono source to them to provide even coverage. They are reasonably efficient and don't need a ton of power.
They also sound like they have some bass when you're right under them, but really don't have the power to make that travel far.
Like Gogar explained, you can get a lot more even volume in the room and lose less of it out of the venue with a setup like this vs the corners or ends.
An amp like this could drive 4 of those speakers wired in parallel (daisy chained two on each channel), which drops the load to 4 ohms and gets you 60w each.
https://www.amazon.com/Audio-Source-AMP100VS-Channel-Amplifier/dp/B00ZSEFU94/ref=sr_1_1?dchild=1&keywords=audiosource+4+channel&qid=1614494177&sr=8-1
I think that room probably needs closer to 8 speakers, but given the budget that gets tricky. With a setup like this you could get an amp + 4 speakers, and then just add another 2-4 speakers later if it's not enough.
If PA is separate and this isn't for the DJ/Dance portion of an event, might even get away with 4 if you get them up high enough for coverage area.