how many displays is enough

someone said that using display entities for block models is counter productive and now i wanna know, how many is enough?
currently each one of my blocks is a marker + block displays. its one block display with many passengers, but they never go above ~10 display entities. the marker and the displays mutually check their own position and kill themselves if theres no pair in proximity every 60 seconds.
is that too much? i mean its only 10 entities but since its a content datapack this will be easily scaled to way more than this definitely. like imagine you place 100 of these blocks and theres already 1000 entities that tick every minute?
should i be worried about performance with this graphical setup and switch to using a resourcepack instead? or is this fine and nobody will place 100 of these?