with the following parameters, what would be the approximate mfdb's to look into.
1) max print size 24x30
2) view camera use as well as hasselblad 503
3) hasselblad zeiss lenses
4) schneider and rodenstock analog lenses
5) i don't need hour long exposure but 10 to 15 minutes would be about right
Normally, budget ceiling would be a necessary parameter as well (unless there wasn't one), if for no other reason than to narrow down the choices. Too often I see people driving themselves mad trying to consider and figure out every product that will do what they want to do, when they can only afford 40% of those products, etc. However, since you listed 10 - 15 minutes long exposure, that does a nice job already of minimizing your options.
*Phase One P45+, V or M Mount (M mount is a consideration with the P1 MultiMount Hasselblad V Adapter)
*Phase One IQ260, H, V or M Mount (M mount, see above, H mount is a consideration with the Hasselblad CF Adapter for H Camera)
You could also add P25+ - though it can produce a fine 24 x 30, you're right at the edge for critically discerning eyes in terms of flexibility (you have a frame that you'd like to crop by 50%, etc). Also, P30+, except using on a view camera is a condition, which will be a severely limited solution with the P30+ due to the extreme color casts.
Your inclusion of condition #4 cannot be answered without more specifically listing which lenses. When it comes to using older lenses, their performance on digital backs varies significantly. And determining which lenses will perform well may need to be a process of self discovery. In the event you need to shoot wide, a modern wide Schneider/Rodenstock is going to be superior, if not necessary. But for longer focal lengths, older lenses can certainly be a possibility for digital capture usage. Generally, you'll find more potential usability with a P25+ or P45+ than an IQ260 with older lenses.