Heat unit in Air Conditioner

Most of you sound quite handy, however we are not so lucky, so we just took our 1997 3023 to the dealer to have a bunch of stuff fixed up.

While it is there, we are considering adding the heating element to the air conditioner. I guess the part is $40 + about 1/2 hour labor.  Has anyone done this?  When I have hookups, it would be nice to be able to take the chill out of the air without running the noisy furnace.  My husband was concerned that only the bed would get any heat (we have the roof mount unit) so I thought I would post the question here.  Any comments?

Also, we are considering adding the lift. I have seen several threads here. Are they worth it?  We would have to replace the stabalizer jacks as well, as the old ones will not reach if the lift is installed.

Thanks!