The mini dome with retracting covers has the virtue that the telescope inside can see equally well in any orientation and the dome doesnt have to rotate. However total retraction of the cover is not possible since the pier underneath limits the degree of rotation below the horizontal. The answer to this is to split the hemispherical covers into multiple nested leaves and have them retract into each other as the roof rotates below the base lip.

The scale of this needs to be between 40 cm - ie big enough for a seestar or a dwarf smart scope on an equatorial base and 1m, which is big enough for most portable telescopes on an equatorial mount as well as big enough to implement the motors driving the retracting leaves. 

There are people with websites who have done this by 3d-printing and screwing lots of small parts together. This design follows that approach.

Mini roll-off-roof observatory. 

This design is a variation on a simple roll off roof wher the roof is the flat roof on a pent shed. The roof rolls off towards the North and is meant to slide over the top and down the back so it is no longer in the line of sight. Telescopes used in this observatory need to be stored aligned N-S so they are at the least height above the mount (in the case of a German equatorial mount)  

The deign below accomodates a tripod and 760mm turning circle. Again the hard part is to work out the opening and controlling mechanisms.