With all of these various demands, what are you expecting to spend on a Bass new or old and what are you willing to spend if you are aware that your wishes are beyond your means?
Maybe it would be good to put an expected or wishful price next to your wish list. You can then see depending on the maker and or/quality what is possible and what is not.
Personally, I cannot stand those angled endpins. I like my Basses with as few holes in them as possible. I plugged up one of those angled holes on a Bass that came in and gained about 20% more noticeable volume and depth in tone. I tested this 'dry' before gluing the 'custom fit' Plug in the Bass.
Also good to note besides just your wishes is what you will be doing with this Bass as well as what type/level player you are currently. Sometimes, a maker can suggest things you are not aware of as well as exclude a few things that may not be in your best personal interest.
Have you ever heard of this scenario? ..
Player: Hey, this bass doesn't work as well as I had hoped for.
..
Maker: I made exactly what you asked for.
..
Good communication and well as understanding between maker and player is a Necessity you can't afford to be without, not a Luxury.
Very often, the maker is a better player than the customer and/or works with and for better players than you might ever hope to be. In this case, take the 'Doctor's' advise!