First time in dry suit and training. I don't know how the dive shop will accommodate my size for training. Perhaps, if the dive shop cannot provide a dry suit to train in, maybe they will let me buy a custom made suit at a discount?
Having paid for dry suit training, they may be obliged to make exceptions and help me out. I was going to buy a custom suit any way.
many dive shops provide most, if not all, gear required to complete an open water course. however, for continued training, this is not always the case.
for a drysuit course, larger shops may have rental suits for you to use. the hope obviously is that you will end up purchasing a suit from them. but if you think the shop is some how obligated to provide you with a well fitted suit for your course, i would suggest that is not the case.