This is my coach which I have owned for about three months now; I'm based in the UK, so this is a bit different to your usual heavy US metal - it's a British-made Plaxton Paramount body on a Bedford chassis, built in 1987. It is unusual in being a short wheelbase version, at just 8m long - I spent a long time looking for an example of this 'short' version as the driveway and parking space at my house is too tight to get a full-length coach in. Also, the extra manoeverability of a short coach will be a benefit at a lot of the venues I will be taking it too - remember that the UK is a pretty small country, and Class-A motorhomes or coach-conversions are a pretty rare sight, and frankly something of a liability in rural areas.
The Plaxton has a 500 cu.in turbo-charged engine in the middle, and is classed as a 35-seater. Body width is 2.55m and 10'9" tall (sorry about the mix of units). Weight is 7.5 tons unladen, 11 tons gross.
The internal height is around 6'2" above the central isle / walkway, but unfortunately less than 6' on either side - so I plan to raise the roof, but I shall do this by raising the central section of the roof panel, rather than by cutting through the side window pillers. I'm doing it this way for various reasons, but mainly because I don't wish to disturb the windscreen or the front side windows, which will be retained as part of the conversion (all the side glass is tinted, double-glazed and bonded-in flush with the body, so I see no point in removing the font windows only to replace them with inferior RV units).
The 'second' and 'third' windows (the middle and rear large windows) on both sides will be replaced by slide-out units that operate within the large window frames (ie, requiring no modification to the structure of the body). Although these slide-outs won't increase the amount of floor-space inside the coach, they will make the inside 'feel' a lot bigger, and of course will effectively increase floor-space as cupboards and units can be mounted in the slides rather than taking up floor space. In addition, the bottom of the slides will be some way below 'worktop height', so I am thinking seriously about the idea of having the kitchen and bathroom sinks and counter tops within the slides.
There will also be a slide-out out of the rear of coach, which will contain the bed. This slide will be 'full height', but again will require no modification to the structure of the body, as the rear wall is just fibreglass.
None of the bodywork will be started until the winter, as at the moment I am using the coach as it is to travel to sailing events (which is my hobby) - so far all I have done is have a towbar fitted (tricky, because the chassis stops at the rear axle), and sorted out the essentials of the electrics - namely 4 batteries for the 24v system, 3 larger ones for the 12v system, plus a 3kw silent generator and a 1800w inverter (remember that we use 240v, so that is equivalent to a 6kw 120v genny and 3600w 120v inverter).
Next on the list is the plumbing system, so I am just beginning to collect parts for that.