A couple of thoughts:

From your questions on this and other questions, it seems evident that you are not satisfied with 35mm equipment, but not sure where you need to be with equipment to make the kind of images you want to make. If there is no immediate, driving(money producing) need for higher quality, I'd suggest taking a couple of steps - use a relatively low budget medium format system to determine if that is the right combination of quality and convenience for you.

Low cost($200-$1000) systems such as various TLR, Mamiya TLR systems, Koni Omega will give you experience in the quality improvements possible in medium format, and the cost, low compared to currently professional systems (Hasselblad...) could be recouped if you move to large format or decide to invest in a 'modern' medium format system. You may be moving 'through' medium format to LF or ULF, or this may be meet your end needs. Personally, over the last 5 years I've moved from 35mm to 6x7 for color, and 6x7 or LF(5x7) for B&W.

You may find that MF lets you work in your 'happy spot', or that it is only a temporary step to where your equipment needs to be to let you make the images you want. The only way to know for sure is to try. Go for it!

Jon