fullscreen background picture captions

i need help. i hired a company to do a ‘custom’ site based on genesis that i purchased. the homepage is a fullscreen bg typical page- nothing fancy going on . i asked that the page caption be changable for each page, movable (left/center/right top/center/bottom)

i am told this cannot be donme without purchasing a plugin

so – would i have been better doing this on something like x theme or salient or something ? i wanted a clean website, and a fast website, and these guys told me they would do it…now i am being asked to buy plugins to use in genesis… btw – i am obviously not an expert at wordpress lol

thank you for any advice you can share