wouldn't a trailed spreader with the right wheels/tyres on spread the weight more than all of it on 3 or 4, can't see the problemThink the biggest problem is customers with unrealistic/unnecessary expectations, a few customers that would rather not have a trailed limespreader but have a trailed drill, sprayer, grain trailers, balers, bale chasers, bale trailers all running the same tramlines they want you lime spread on.
The customers who are expecting you to spread lime with a hovercraft loaded via telekinesis are probably the same ones who would cancel on you after 1mm of rain or £5/t drop wheat price.
79 pages of how to complicate a simple job.