Custom Apartments/Apartment complexes/buildings

I've seen this mentioned in master threads about various topics but didn't see any recent threads about this in terms of suggestions.

I have City Living but am not happy with any of the apartments & would like to build my own like I did in Sims2 and Sims3.

I'm not sure how apartments work & how things are flagged for them in Sims4, but I recall in a previous game (can't remember if it was 2 or 3) there were room markers to designate apartment space vs public space.

What I would like:

• Build, select, & group rooms in to different apartments (the pre-made apartments already have the parameters established so there must be some way to flag it)
  
• Mark some areas as private apartments that can be rented or purchased by sims
  
• Allow sims to purchase multiple apartments and sublet to other sims to earn $
  
• Allow sims to own entire buildings & allow other sims to rent them (this would come with a landlord career or job)
  
• Mark some areas as communal but only for residents of the apartments + sims who have been invited over
  
• Mark some areas as public so that any sim can visit & use the facilities
  
• Have communal pools, gardens, gyms, playgrounds, park/barbecue areas
  
• Have apartments where children/babies are banned
  
• Have apartments where pets are banned
  
• Have apartments where only elderly sims are allowed to live but can have younger visitors but they have to leave at a specific time
  
• Set hours for communal areas to be open (have specific hours or allow them to always be open)
  
• Have parking garages/spaces/areas designated for sims based on what apartment they live in (if vehicles ever get added). Sims could also purchase/rent additional parking spots for other family members and/or guests
  
• Have apartments designated as pet friendly with play areas for pets
  
• Have apartments designated as kid friendly- perhaps with daycare available for working sims
  
• Allow for basement apartments with private access or access from within a lobby
  
• Allow for separate buildings to be rented like at a trailer park or small apartment complex
  
• Have a cafeteria for sims who don't want to cook their own meals & allow for meal delivery to apartments for elderly sims (or sims who don't want to go out)
  
• Have a vending machine area for sims who just want a cheap snack
  
• Have a party/bar area that can be used as a venue for weddings, birthday parties, bachelor parties, or whatever sort of party where there can be catering & there can be a vendor that dispenses drinks from a bar
  

That's all I can think of for now. Anyone have any other ideas/suggestions for apartments?