About the 'fridge. It is small. The freezer works well. It is small as well. Again, you have to think like a backpacker. We extend the space in the 'fridge with plastic boxes for veggies and small items. But, the boxes go in and out a lot as we search for what we want. We used the fridge as the only source of cooling food for 3 months. We did have to plan ahead and make frequent (every three days or so) trips to the grocery store. I also take a small slow cooker to have a meal ready to go after a day of play and sightseeing.
When we go camping with family and friends, we do bring a large cooler. There are some super insulated ones that will hold a bag or two of ice for several days. Works easily for a weekend trip.
You mentioned that you don't like to sleep next to a wall. That seems to be the biggest drawback for a purchase of a Bambi. There is no getting around it, if you use the bed, someone is up against a wall. A better mattress really helps. It seems like there is more room because you aren't sinking in and rolling to the middle of the bed.
We put the microwave where the factory tv sits. We purchased straps that adhere to the table surface to secure the microwave. You can pick up those straps at an RV store. The microwave hasn't moved and we have been up and down all over the Rockies. The tv is now around the corner at the foot of the bed. It can be pulled out to face the dinette or left in place to watch from the bed.
I think all units have to be customized to some degree to fit the needs and wants of the user. The ones we have done are inexpensive (except for the mattress) and easily accomplished.
I hope my comments are helpful. I will be interested to hear about what you finally choose. If you do rent a unit for a trip, please write about your experiences. I am sure it will be an adventure worth talking about!