[Mageeacres]

Thanks for the replies.
      I figure I have about 220 sq ft of air space in the coach all else is cabinetry and furniture etc (as opposed to just the shell estimated 290ft2). And enough room in the central basement with necessary ventilation of course for efficient heat removal for one each condenser compressor. and topside enough space for each blower/ evaporator, one mounted fore and one mounted aft on the interior, (probably mounted within the outdated tv cabinets.) …of course these being heat pumps they will definitely be able to assist in heating the Classic existing three propane heaters and four electric heaters dispersed strategically within the coach.   
    The power requirements are 120vac at about 600 watts each. We Will be installing each unit on separate legs of the 50 amp circuit as not to tax the individual dual breakers in the power panel, (ok one project at a time, I definitely would have used single breakers at the expense of a larger breaker box. IMHO ). Thus allowing when the generator or 50 amp shore power to be able to run both simultaneously or one unit for sure when only 30 amp service is available.
    I Had considered a dual mini split system however that would limit the shore power to 50 amp service for 220 vac service necessary for the single compressor/condenser and I need the lesser current draw latitude for when traveling and if only 30 amps shore power are available or inverter power limited by cloudy or inclement weather.
    This power arrangement would at this time mimic the existing power setup of the current two Coleman rooftop 13500 btu units. The advantages of the new single mini splits is that at 12000 + btu each they will use about 20 to 30% less energy and that’s definitely a benefit when the time comes to upgrade from flooded batteries to lithium, and solar as the roof will not be cluttered with the noisy 1970s inefficient technology by designing something with too much loss of cooling to the condenser so close to the evaporator…  again … in my humble opinion.
    So it looks like minimal drilling is required for the flexible (yes they make those now) freon/electrical lines while running 9’ of 10/3 Romex to the panel box from the basement will leave two circuits to use where the existing rooftop inefficient ac units were and to install a dc power updraft/downdrafts vent as needed in those fall and spring times where beautiful weather persists. And of course, routing of the condensate drains for each to a possible central collection point . (collecting the the condensate water back into a/the potable water tank, Hmmm an endless supply of clean water… another benefit). I’ll have to think on the risks of potability or at least other uses like keeping the window washer reservoir full or using the water for other uses.
    Ok now for the money…the cost for two mini split systems at this time is roughly 30% less than replacing the two existing noisy inefficient 70s technology.. I digress.
      Ok thanks for listening and
I definitely appreciate your comments.
Thanks to all the newell gurus out there.
m-