or most importantly the ground rules you set at the first meeting....vacation time is a huge one....if they go on vacation do you still get paid? For many wealthy people travel exstensively.
I looked at taking on a family that is extremely wealthy (read top brewer in the world) They wanted someone to cook/serve/cleanup make essentially uninteresting food (3 courses) there were numerous small children that would desire their own foods....and the clincher their pay was hourly and 1/3 of what I asked for 10 years ago when I started PCing.
Needless to say, I turned around and walked out......there is a segment in the society that grew up with full time household help that is used to paying a non-living wage....