I had a front door Alpine for 10 years and mid door Alpine for 5 years now. With an Alpine, now matter which one you have, you still have plenty of storage. I always carry a spare tire in both of them, along with tools, spare parts rv supplies and still have extra room. On the mid door the steps lift up and there is quite bit of storage under the steps. You did not say what you are looking at, but if you have a Hydro Hot and residential refrigerator and only have a propane cook top, you probably wouldn't need a large propane tank. I removed my large propane tank and put in 2 1/2 gallon tank. I made the propane tank area into more storage.
Although either one is good, I prefer the mid door. It is easier for loading and not having go around the front seat walking the length of the motorhome. With the mid door you loose a little interior space.
2007 Apex MDTS (425 hp) #75723
2007 Toyota 4-Runner
2014 Ram Laramie 3500