3 Birds need to duck because..

I need to knock them out in just one post;)

Hi All, Happy Memorial Day!

I know i should open my manual book up but i'd rather post to you all here about 3, maybe even 4, things going on now.

My 1998 Class A Holiday Rambler Endeavor thermostat, well it seems to be hitting and missing when i initially turn it on, but thats not my question. It says there is a "zone 1" making me think there might be another zone i'm not getting a reading on where the cool air doesn't seem to be as strong in the back bedroom, nor do i hear that back ceiling vent kicking in?? Whats going on??

My battery that came with the RV isnt holding a charge anymore, whats the worst problem going on here but since it doesn't look new, should i just go out a buy another one anyway or get a diagnostic check some place other than CW since they are so back up??

And now even thou Camping World's website says The Splendide 2100XC isn't in stock, i called them and they said it would be in stock this past Friday but they are seriously backed up, for me to expect a long wait for them to get to me in installing it or doing any work, and especially if i have 2 other things needed to be done, for minus the thermostat question, i didn't mention i need my toilet gasket replaced, as well? I'm a Fulltimer, so that not possible.

Sorry if my post isn't clear, nor is my head & chest right now,,, hack, hack!:(

So along with whats going on with my thermostat, what are my options??

TIA!!!