Good pointsTo your actual question... as in, can you pull this behind a rototiller?
That depends on so many factors that are unique to your situation, and what you mean by "rototiller"... as in just a rototiller... or a rototiller behind some form of tractor.
Personally, for a regular rototiller (no tractor involved), even within my own gardens, there are varying levels of what it could pull.
On hard clay, I could pull a haywagon with a rototiller. Same ground after two inches of rain? I couldn't pull a sitting hen off of a nest.
On the hugelkulture beds that are at least a foot deep with composted manure? I have to push the tiller. It won't even pull itself.
On the other hand... the 7' tiller that goes behind the 75HP four wheel drive tractor... has no problems under any of those circumstances. GeoTH's system of haying plastic behind a "tiller" is similar... just on a smaller scale with a smaller tractor and tiller.
Will be pulling it behind a 4 ft rototiller behind a 22 hp Kubota bx. I rip the ground with a subsoiler before I rototill.
Will build hitch to connect with adjusters and some floating to level
Did this before with angle iron. Eventually redesigned the plastic layer for a 3 point hitch
Now want a compact design for a 1 pass till and lay process
Been using plastic (& drip tape) for years and nothing better for tomatoes, melons, peppers, pickles,flowers with grass strips between. No weeding and no mud
Corn, cabbage, string beans are in 36 inch rows cultivated with a power king 24-14 equiped with a modified belly mounted cultivator.