Okay, I'll throw in my 2 1/2 ¢...
I am slightly claustrophobic, so back in 2000, when Craig & Cary built our 1st teardrop, they made it 5' wide with 2 doors, sunroof and front windows, which made all the difference for me (translation: You wouldn't have gotten me in one any other way).
When they began building teardrops for a business, they offered a 4' model. I remember having to spend some time sitting in a 4' demo unit with one of my kids (they were sleeping in it for the night). In addition to being 4' wide, it had only 1 door and no front windows. I couldn't handle being in it for very long. Even when the guys had a 4' demo with 2 doors and front windows, I was not at ease. I need a 5' for my "psychological" comfort zone.
They no longer offer the 4' models because, quite frankly, people wanted 5' ones. Most vehicles can easily tow a 5' one. For ours, weight wasn't a big issue as there wasn't much difference between a 4' and a 5' and both were lightweight.
It really comes down to what makes you happy/comfortable. Weight might also be a consideration, depending on how you construct it and what you add to it.
My recommendation would be to get to a gathering or see if there are any forum members in your area who will let you come take a tour of their teardrop. Then you can check out both 4' & 5' teardrops. Just sitting in the enclosed cabin can help you have a perspective that looking at or lying on a bed in an open room cannot.
Good luck!
Betsey
