[PNW Fireguy]

I respectfully disagree. Over the life of the batteries LiFePO4 costs less than PbSO4...even drop ins which are the far more costly than DIY cells are less over their entire life. Yes there is no getting around the fact that the initial outlay if frankly much more but you won't be purchasing replacement battieries over the life of your coach. Let that sink in a minute. There are bargains to be found like "Black Friday" sales, Costco road specials, Amazon Chins. Only the OP can determine if his/her usage will warrant the expenditure. Who knows perhaps with the added battery life they will take to boondocking like a labrador to water. Don't fall for the old argument about the price being the cost.