The biggest benefit to having the 4 separate 315s would be to run at different heights for different canopy levels. But I like the idea of rotating trays and staggering harvests. But adjusting 4 lights instead of two every couple of days might suck.
I'm doing good, I pretty much just stay in these days. Had some things come up again but I'm hoping to finish out the last few things I need to get a full set up together correctly and pick up a decent ph pen. Got my ppm meter in and my tap ranges between 120-130 ppm without anything to terrible in it, with a zero filter it comes out to around 5 ppm.) Just deciding on a coco brand and my final pot size really. And when I have the funds for a new tent and a ec fan/filter. I think ive pretty much got everything else, I would run open air but I need the smaller space to use the 315 cmh to heat it effectively. Start seedlings under 24 hours until outside temps raise up in a few months so planning in a month and a half or so to plant. (Might move some outdoor again and rebuild a greenhouse potentially.) Or just doing a 5x5 flower chamber after this veg set up. Probably a diy led build if I do.
I hope you and yours are fairing well this year, and made it through the last.
(Edit: I'm ripped, that was probably more of a pm type of response lol. But thats up with me)