You could make the rails from wooden 1x1 screwed to plywood bed and run the trucks between them rather in the manner of the Montreal Metro. You make the trucks from plywood or MDF with large non-swivel castors mounted on for wheels. The furthest one away has a stout rope attached to it. To load tat into berging simply add a truck, then pile on tat. When it is full, push the truck down the track and add another. To retrieve tat, pull on the rope to bring trucks back up the line.
Mind you don't make your house fall on its side with all the weight though. You may need to counterbalance the house with lead shot in the gutters.
And congratulations on moving in! When's the NetherPilg?
Before going that way the first thing to try is to just move your existing APs, try different channels, fiddling with the antennae, and then move on to testing out more powerful units. Newer 802.11ac units like the one I linked have multiple antennas and beamforming technology and are pretty good at getting a stable connection through walls. That one's Power over Ethernet as well so you don't to position it near a mains socket, though that raises the cost a little more since you need an injector to supply current. (Note also if you ever buy PoE network gear always use an injector that the manufacturer has tested, not whatever's cheap.)