Molasses for Vodka? Foaming is a certainly an issue. I use molasses in my rum (separate fermentation from a larger cane syrup fermentation, and I only distill it a few times a year, so the hassle is minimal). You have to keep a real close eye on the scaling, particularly on the openings in your plates. Scale can wreak havoc on your efficiency if you're making vodka.
This is only my opinion, but I'd make sure you have a bit of extra freeboard in your still before it hits the 1st plate, and make sure you have a foam stop before the plates. Further, if you can get away with having a pot still (no frills....pot, lyne arm, condenser), and then a separate pot w/column, you'll thank yourself many times over. If you can use your column solely as a spirit column, the scale issues disappear. Scale in a plain ol' potstill isn't nearly as much of a concern.
Also, the quality of molasses has been on a slow decline over the past decade or two. When I was at Alltech in the early 00's, there were several rum producers from the Caribbean in attendance, and they were all trying to solve the problem of low-sugar molasses. Keep an eye on those spec sheets.
It sure would make an interesting vodka, I'd think. Unique selling points are always a good thing, especially with vodka. Best of luck to you.