Im wondering why everyone is referring to a "sump"? Or, has he posted before and you already know his circumstances?
Most drains are located below the concrete of the basement, and can be tapped into, instead of going into a sump. Even a shallow drain, you should be able to bust into the concrete, and put in the plumbing and attach it into the drain line, with out too much trouble...
When you cut into the concrete of the basement for the drain line for the tub, you can also cut a trench for the wet bar. Though, you will have to pay extra for this, if the contractors do this, or you can wait and do this yourself, depending if you want to do anything else after the house is built. The Contractors can "always" add extra, but, its gonna cost you big time, as its not in the plans, and will have to be put in there, and anything extra you do, should have been thought out before you started the entire project... (But, as you go along, its SO easy to realize that you may need "this or that" in the long run, and its just a "little thing"...yea right! You want... You pay
!)....
Is he going into a septic system? Is his basement that subterranian that he is below a drain line?
My wife is wanting a shower in the house, and wanting me to get rid of this old claw, cast iron tub...I told her NEVER! I will take it downstairs and plumb it in, before I get rid of my tub! There isnt anything like a good soak in a deep cast iron tub, insted of a shower, in my opinion, especially for those who have lower back pains... So, it may come down to that, moving the tub in the basement, after I move her washer and dryer up stairs, so my "skullery maid" doesnt have to go up and down the stairs all day, carrying a load of clothes...
Just my two cents worth...
Jesse