Since your rig is stored in Florida probably as a Snowbird option it doesn’t sound like you do any dry camping so no need for an expensive lithium battery. I would opt for a AGM …no water needed and no corrosion. You do need a 3 stage charger or you’ll be buying a battery every year.
If you dry camp and are a little bit handy, building your own Lithiums is a option. Nine months ago I thought I had done a good job of building 600 AH of lithium‘s for $1200…$2/AH. Just bought 620 AH of cells for $370. Add $120 for 2 BMS and $50 for cables and lugs plus 10 hours of my time…less than $1/AH which is cheaper than lead/acid and 5X the life. Yes, they are not likely to be grade A cells so probably only 300 AH, not 310. About like only getting it charged to 90% with your current charger…close enough.