Battery charger deep cycle batteries and desulfiting?

I have a 5th wheel in Tahoe that is plugged into to 110 in the winter, and boondocked with solar panels in the summer. It's got 2 6v Trojan batteries that are 5-6 years old with poor maintenance. I've also got a camper on my diesel pickup with an AGM RV battery (I think starter/deep cycle). I've also got 2 12v batteries in my diesel pickup. All of these batteries sit with no charging for long periods of time. I'm thinking if I buy a good battery charger, that can desulfite, I might revive a couple of these batteries, and if it doesn't work, I'll have a good charger to keep new batteries in good shape.

I've also got a couple car and motorcycle batteries that need charging on occasion.

Anyone know of a battery charger for a reasonable price that will do all this?

Thanks!