my old FJ60 Landcruiser had plenty of room to sleep in with rear seats folded down. but then all your gear would need to go somewhere else.
if you can get the diesel motor... the 4.2L gas motor, while nearly indestructible is a gas hog getting 12-14mpg. which is the only reason why I sold my old FJ-60. really miss the old girl... in the USA almost no diesel landcruisers are available. if I ever get another FJ60, will install a Cummins 4BT diesel.
a roof tent of course be deluxe. but a roof top luggage carrier like a spacecase or skybox could store your gear. giving you sleeping room inside. if you have the time to watch craigslist... they pop up for $150-$200 range
R90S, R80G/S PD