Yes Rollers are a good way to go , then you just adjust the Wheelbase,
given most folders are not shorter wheelbase than regular bikes ,
that should not present much of an issue.

smaller wheel will settle a little lower between the rear 2 rollers..
you could re drill holes for the rear roller axle and move it forward a bit.
the middle roller and connecting belt turn the front roller .
there are usually a few holes to shift the front roller, that is the wheelbase adjustment.

then the roller, typically, folds up and stows easily when not in use.

the one in the picture has, apparently, flared the drum ends
to keep from riding off the edge , in a lapse of attention.
clicking on the Imbed goes to the video,
and says what make and model the rollers are.

seems to me , the trail of the fork changes with the roller/tire contact point.
typically that is ahead of the vertical line thru the hub axis,
so would be a bit different than it is on the road.