u/EmptyRebuplic

I'm a master electrician, and have a customer who would like me to add mini split heads in 15 different locations in a high end finished home.without any exposed lines. There is no budget. obviously this is a large project that will involve drywall and framing demo. To make things even more complicated they would only like ceiling cassettes. Just looking for some thoughts on what I may be overlooking besides the obvious.

EDIT: thanks everyone there will certainly be branch boxes involved, this is an existing home dating back 1993 with many additions since then