it is a lot of work watering 50 plants, thats for sure.
you will need a res or you will need to fill and mix 50 5 gal pails to water all those girls
and if you buy the res you might as well set up an auto watering system because doing anything 50 times in a row sucks
and now that you are there, you might as well not by the pots and invest that money in tables and clay lol
my best advice is set up an ebb and flow table with a scrog net and save yourself a shit ton of work.. if you can afford to anyway
otherwise make it as automatic as you can because carrying buckets will get old by week 2 of flower at the latest