IMHO.....
Parts? cheap for the most part except for battery replacement.
Labour rate? If DIY - assess what your personal time is worth based on your experience and credentials...... R
U a professional photographer, engineer, technologist, electrician, Hobby shop owner or hobbyists trying to break even on the cost of your hobby!
Time? Initially allow for 2 to 3 times the amount of time you initially anticipate for unexpected setbacks.
i am currently thinking about a new use for large multirotors. can anyone here give an estimation on the costs of maintainance and repairs for heavy daily use of a large multirotor?
thanks in advance.