You need to look at some versions of 5th wheel toyhaulers. Some have small garage areas perfect for a golf cart or two harleys. When the golf cart is out the garage can be converted into a craft, living or entertainment area using folding or blowup furniture.

Some RV'ers use medium or heavy duty trucks to tow the 5th wheel. These trucks can be outfitted with longer wheelbases to allow room to carry a golf cart behind the cab.

We carry two 4 wheel mobility scooters and have outfitted them so they look like small golf carts. They have removable awnings/roofs, radio, cup holders and baskets to carry stuff in.
One goes in the bed of the truck behind the hitch (just have to raise the 5th wheel up high enough to pass by it when hitching). The other is carried on a lift rack at the back of the 5th wheel or on the car if we bring it (usually).

With the two mobility scooters I can go where I want to go and the DW can go where she wants to go. Or if she gets to chatting with someone I can keep going and she'll catch up.

makntracks, I agree with The Bear II.  Although we are currently gonnabes, I have also been shopping around.  May I suggest that the toyhaulers offer so much more versatility, IMHO.  Some have 1.5-2 bathrooms, for one thing.  One of the reasons I have gone from considering a 5er to considering a toyhauler is because we want to get a 4-wheeler.  We think it would be helpful to be able to scout out areas where our toyhauler may or may not fit.  In other words, if you turn down a road to check out the sites and there is nowhere to turn your big rig around, well, oops!  If, for some reason, we had to go to a bath house/laundromat, a 4-wheeler would be convenient for carrying us and our stuff.  A washer/dryer (if you opt for that) will also fit in the "garage", giving you more storage in your bedroom. While a toyhauler shortens the space in the kitchen/living room area, it also gives you a place to sit "outside" in a driving rain, for example, instead of being couped up inside and having nowhere to go!  It also offers additional seating and a table for "outdoor" visits, card playing, "picnics", etc.  Some also offer screened patios.  They even provide additional sleeping/storage space.  So, there is MUCH flexibility in a toyhauler.  Finally, the main TV in a toyhauler is located at the end of the room, and not across from a sofa or theatre seating.  Not convenient.  BUT, all is not lost.  Just put an easy chair/recliner in the garage conveniently situated in direct vision to the TV out there.  Problem solved, AND you have your space and he has his man cave!

Since you are early on in the process, your choices will change many times over, I'm sure.  I know mine have.  Just keep an open mind and toss things around... with your DH!  When the time arrives to make your purchase, you will know, by that time, that you have made the right choice.

Good luck!

Look at the Heartland Cyclone models. I'm currently debating on one of those or an Airstream. I like both but the DW hasn't weighed in yet.

The Cyclone garage door can actually be layed out like a deck and has rails that go around so the little ones don't fall off. An awning on the back and BAM! Instant outdoor extension of the hauler!