I think it is a decent idea for someone with a very high level performance horse just so they know exactly what the horse is getting and it is guaranteed to be the exact same every time. However, many horses don't need the extra sugar provided by even 'low sugar' molasses. I thoroughly believe that many people overfeed their horse for it's needs and that results in founder and colic and insulin resistance and any number of other health problems. I think you should feed the feed that will keep them healthy and nutritionally balanced but without all the sugars and preservatives. We have been feeding alfalfa hay for more than 40 years (supplemented by sweet feed for the show horses back in the day). Been feeding strictly alfalfa for about 15 years with some occasional grass hay thrown in there and all our horses are fat and healthy. We've never had a problem with founder or colic since we stopped feeding sweet feed and our horses are living well.
On another note, this nearly caused me to crap and fall in it.
You should be able to get a nice grass or alfalfa type hay for $400-600/ton retail in the ocala area.
It makes me happy to live where I do. I just got a load of really high quality alfalfa for about $140 a ton.