i am not the electrical guru on the forum so take my advice with a grain of salt. your question is pretty general and hard to answer in a single post.
you'll have to start out by determining your specific electric needs and plan your system from there. none of us can tell you what your needs are.
there are some online calculators that can give you a starting point.
you'll need to research batteries, solar panels, charge controllers, charging and rv wiring.
specific questions are much easier.
what you are dreaming about is very doable. just a guess that 1 house battery is going to be limiting, but you can figure your own load.
my bus has 7 batteries total. 2 start batteries, 1 generator battery, and 4 house batteries. everyone's setup is unique.