Yeah, I tend to never use any water to make food because I don't think it's actually worth it.If you have lots of Water Collector you'll be totally fine for the water. My gf already told me several times that It'll be great to be able to put the orange fruit trees in the greenhouses haha
I'll be honest, even when the seed drop was lower I did a good 170+days without having any problems whatsoever in the "food" department. I had 13 Greenhouses which were constantly giving me herbs and roots. It wasn't always working since I played a lot more than I expected but it did its job by giving me food for the days I was busy getting my 50 GTRs =D
TL;DR : Water should be a problem at all if you're planning everything. Having the possiblity to plant orange fruits in greenhouses could be great.