I keep thinking that an adjustable height pier would be incredibly useful. Not least for mounting and dismounting a long and heavy OTA. I have looked at counter-weighted, parallel-paired, parallelograms but a counter-weighted see-saw arrangement might be easier to achieve and use in practice. Moving the heavy counter-weight between observing sessions might be quite a hurdle unless it could be easily spun on a threaded rod. Not impossible as large stud sizes are readily available in timber merchants. The counterweights could also be duplicated to halve the immediate workload.
A long reflector and classical refractor have such extreme opposites in their needs for pier height that they almost preclude each other. It is difficult to see how the [very heavy] mounting can be easily and quickly moved between piers of only two feet high and well over six feet. The sheer weight of the mounting does not make the task appealing. Perhaps the mounting could be attached to a sled which rises and falls under the control of a block and tackle along a sloping pier?
Oddly, the two instruments are very similar in both length and breadth. Except hat one is viewed from up near the top and the other from the bottom. The arrangement shown is simple to achieve but has a massive overhang requiring equally massive counter-weighting. Having each instrument at the opposite ends of the declination axis means they would balance each other at not much extra weight.
Parallel mounting of two such instruments on the same pier makes little or no sense. Even though the reflector could be heavily top-balanced to allow a tall pier, the mass required could hold a lot of heat. Which is likely to be released into the light path for literally hours. The alternative is [perhaps] to arrange a mid-height pier but allow large differences in observer viewing height. A platform or stepladder for the reflector and an adjustable height seat for the refractor?
A more serious arrangement might be a car port to protect the instruments and refit the optics for observing sessions. Though I'd much prefer the instruments to be permanently set up ON TOP of the carport as a raised platform. Then all I need is an observatory to protect the very exposed instruments from storms and the elements. And, all on top of a very tall pier? Better, I think, to have a cross-axis mounting supported independently of the platform.
The observatory would have to be highly wind proof. It must also ensure against any chance of the observer falling from a great height when using a stepladder while observing with the 10" f/8 reflector. This is all getting very expensive and cumbersome and requires an awful lot of heavy woodwork before building the raised observatory is even considered.
I keep thinking a miniature "Nissen hut" could roll back on rails over the roof of my existing, pitched roof workshop. Such, tunnel shaped structures are readily available in all sizes for protecting farm animals. Or, a semi-cylindrical, roll back roof could protect the instruments with them both permanently mounted on a tall [long] cross axis. This would leave walls of a suitable height to protect me from the almost incessant wind. The degree of roof roll back could be adjusted to provide reasonable protection from the overhead projection of the 'barrel' roof. A semicircular, southern gable end could be folded down with a hinge at side wall height.
A much cheaper alternative would be a cross-axis mounting built onto a triangular timber 'trolley' with large, free running wheels. This could be wheeled out from under a protective cover and moved to clear sky. Not ideal from a number of standpoints. Not least rapid polar alignment and a lack of shelter. Then there's the matter of providing power and cables for computers for imaging and power for the drives. Never buy a garden with the house along the southern border!