I my ideal world, I would be feeding 50/50 alfalfa/grass hay. In my non-ideal world, I am currently feeding straight alfalfa. Why? Because the quality is wonderful and the price is right. Not that it is cheap, I think we have the second highest hay prices in the country next to California. No hay is "cheap" here. But I get the most bang for my buck with alfalfa.
To get decent grass hay, I would either have to buy small bales that are shipped in from Colorado, which is significantly more expensive than alfalfa, or buy bermuda, which is also significantly more costly than alfalfa and the quality is iffy. I hate paying more money for worse hay.
Also, I can get alfalfa all over the place. Bermuda I have to seek out. My local feedstore where I buy my hay quit stocking bermuda on their hay trailer because very few people buy it. If I want it, he can get it for me, but I really like to see what I'm buying first.
So I guess what I am saying is, grass hay is not impossible to get but you are paying a lot more money for iffy quality. I do intend to get some bermuda at some point and start feeding it 50/50 with alfalfa because I have a young horse that I am riding and he doesn't need to be bouncing off the walls. But I might end up waiting for spring to do that.
I would love to feed more grass hay, but I hate paying more for lesser quality hay. And by lesser quality I mean dusty/musty/garbage in it. Not all the bermuda is like that, but probably at least 1/2 the bales I have fed have been extremely dusty if nothing else. I can find beautiful alfalfa at every place that sells feed in town. Sad but true! Such is life in Arizona.
Believe me, I would love to be feeding a lovely grass hay or grass/alfalfa mix.