Here are the measurements for space for a larger bathroom:

• The length between the master bedroom rear wall and the front side of the rear bunks is 80 inches. (Of that 80 inches in length, the current restroom uses 20.5 inches + the existing dresser is 24.5 inches + the length of space where the right-side swivel chair sits between the dresser and the front side of the rear bunks is 35 inches for a total of 80 inches in length)
• The master bedroom rear wall is 54.5 inches wide. (Of that 54.5 inches, the current restroom closet is 33 inches in depth out from the wall, leaving 21.5 inches for the portion of the rear master bedroom wall where a mirror is currently mounted on the wall. Near the floor is an outlet.
  The ceiling at 33 inches from the side wall of the bus is 75.5 inches tall from floor to ceiling.
  In my opinion, if you want to keep the existing right-side swivel chair where it currently is (rather than have the new bathroom go all the way to the bunk beds), then a reasonable size for the new bathroom, still leaving a good amount of hall space, would be 45 inches in length (the same direction as the length of the bus) by 33 inches in width by 75.5 inches tall. In my opinion, that is more than plenty of space for a larger bathroom - I have seen a camper that has a shower, toilet and sink fitting in a lot less space than what the Fun Runner bus has to offer.

If you wish to add a kitchen sink, the length of space between the passenger-side couch and the edge of the kitchen countertop and that measurement is 44 inches. The counter is 21 inches wide - out from the side of the bus. The counter is 34 1/4 inches tall from floor to the top surface of the countertop. So, you have 44 L x 21 W x 34.25 H worth of space for a sink and bar/countertop extension where the passenger-side chair currently is. You could, of course make the width of the sink countertop wider than 21 inches, but I chose 21 inches simply because that is the current width of the kitchenette counter.

If you wish to replace, with a futon, the existing:

• Couch (located in the front section of the bus), then the futon must be less than or equal to 60 inches long by 49 inches wide
• Couch + small end table, then the futon must be less than or equal to 78 inches long by 49 inches wide
• Couch + small end table + chair, then the futon must be less than or equal to 94 inches long by 49 inches wide.

We were a 6-member Band, but the Band doubled in size to 12 members, so we simply ran out of room to accomodate everyone.