Bathrooms and Security costs:
It’s not unusual for master and guest bedrooms in high end homes to have his and hers en-suites. The downstairs loo is known in American speak as either a half bath or powder room and would probably be included in the 16. One way of getting to 16 is 4 bedrooms with his and hers en-suites, 5 bedrooms with one ensuite, downstairs loo, shower room at the pool, shower room / spa at the gym and a staff bathroom.
If one 24/7 guard costs $800k a year that’s a lot of money. If you don’t go anywhere then one person at your property all the time might be enough. But maybe if you are out for lunch or shopping or meetings you need two for that in addition to the one at home guarding the property. Plus the kids are now at school so I assume they want them to have their own security when outside the house for school, play dates, sports and activities, birthday parties of schoolfriends etc And when they do a trip to New York or somewhere that needs more guards plus expenses if you take one you know and trust as well as get NYC based security who have the local knowledge. If Harry is seeing paps lurking where there are none, feeling paranoid and fearful of the press and the public they could easily be spending $3-500 a year or more on security. Plus the housekeepers, nannies, gardeners, maintenance, house manager, chef etc. Someone said a team of 15 staff - is that confirmed or speculation and does it include the security? Add annual property taxes, utilities on a large property, school fees, holidays by private jet to exclusive places etc. Even if all this is only $2-3m a year then for the next 30 years that’s $60-90m spending and that has to come out of the post production and post tax profits from the Netflix, Spotify, As Ever jam businesses. It needs some serious income generation over a prolonged period but Spotify have already bowed out and the Netflix deal does not seem a winning formula likely to be renewed. I can see them doing ever more desperate things - Spare 2 - and I can also see Meghan doing a post divorce book of her own to tell ‘her side of the story’.
William is said to be stubborn but once he is king and has the untold wealth I can see him giving Harry an allowance to keep him quiet on the understanding the money stops if he steps out of line. Whether Harry’s mental health will be good enough for him to stick to living quietly in a royal estate as a kept man while feeling humiliated at how his life turned out is uncertain.