Wow, this is refreshing! New-to-RVers actually doing homework, listening to the collective wisdom available, and doing things right! I applaud you! Sadly, I see too many posts from people who, for lack of a better explanation, really have no business owning a large RV.
It's perfectly acceptable to plug in to a standard 15A outlet at home (with an adapter) for lights, refrigerator, furnace...that should also charge the house batteries. The only things that you won't be able to use is the roof A/C and possibly the microwave.
You seem to have everything well thought out and planned for...just remember, owning an RV is constant attention/maintenance. Don't sweat the small stuff.