At our barn everything is fed as much as it needs hay wise (from fat ponies to 18hh 86" blanket wearing monsters) and outside of beet pulp, complete feed, oats and bran if you supply it they will feed it for no extra charge. If your horse needs timothy hay for health reasons, they will bring it in for you no extra charge.
The outdoor horses are all on group turnout and a round bale and they try to keep the ones that get supplements all in one field so they can all get fed at the same time, however if it is just one horse they will grab a halter and go stand with the horse to feed it (I think this is only the one horse they have now that they do this for because she is ancient and has been at that barn since she was young). Everyone always has water access even though the individual turnouts have buckets.. they get dumped every night so they don't freeze in winter and re-filled when the horses go out or drink everything.
So everyone is generally fat and happy outside unless it's a baby in a growth spurt and the indoor horses are all maintained at a good weight (my horse always looks awesome - I have to try to keep weight off of him and when we clip him he is shinier than he is with long hair). Keep in mind that board is nearly $700/mo indoors and $350/mo outdoors... So you do have to pay for the care and facilities that you want..
They do require worming and usually just do everyone in one go unless you request to do it yourself. Everyone gets spring vaccines, flu/rhino, 3 or 5 way depending on if they go off property and IN strangles. My horse gets flu/rhino in the fall as well because he travels off property in winter. Teeth floating is another common practice, it's not required but you get looked at funny if you don't at least get the vet to look at your horses teeth. None of those things do I consider "too much"... it's part of owning a horse to make sure they are comfortable and protected from life threatening diseases which there are vaccines for...