Does this place sell water heaters?

Home depot a absolutely does carry the ones for mobile homes. U always upgrade to a 4o gallon heater. Make sure "tall" unit. That way it fits in the little cabinet

Yes they do and home depot does not carry the required heater for a mobile home

Yes they do, hours are from 7 a.m. to 4 p.m., ask for Diego

I'm not sure, call and ask home depot does if they don't