Added features

I am looking at buying a 2720sl.
I have 2 questions. I really wanted an oven and not a microwave in my trailmanor, but this dealer only has the micro.
They said that this micro has a convention oven feature is that the same as having an oven?
Do you think that is better?
The other thing is the added features like a receiver hitch in back for bikes and the solar panel. Is it hard to add those features later?
Also, it doesn't have a stove cover. Can that be added as well?
Your help would be greatly appreciated.
Debby K.