i towed trailers before, such as jet ski and trailer for work thinking i was under a legal weight limit but actually wasn't luckily didn't get caught, but stopped and did the test asap. as for training with bob i started with him at 8:30 in the morning my test was at 2pm

but if you havn't towed too much before i would do at least 2 days with him. it would probably be best to ring him and he will advise you better he also does a deal if 2 people do it together

hope that helps