Wow, what a difference in prices between the juice and the fresh grapes! By my calculation, 5 lugs of any of the grapes would cost about $140 (plus crushing/destemming and pressing costs) to make 5+ gallons, while juice is only $50 for 6 gallons. The fresh grape prices are a little higher than FVW's, but the juice prices are surprisingly low - in fact, that is cheaper than the most concentrated kit! I can only wonder if there is something wrong with the juices, lower quality in some way.
Ken, I would consider getting 6 (instead of 5) of the 18-lb lugs unless you have a 5 gal carboy and some one gallon bottles too - FVW's orders were for 36 lb lugs (~2 gallons each), and 3 lugs was just a little over 6 gallons after pressing. I doubt 5 those 18 lb lugs will yield 6 gallons unless you press them excessively, which would be bad because too much pressing squeezes out bitter juice and other stuff from the seeds and skins (if you like fresh grapefruit, you could compare it to squeezing the grapefruit rind after the flesh is squeezed dry). Unless you plan on using a 3-gal carboy and some 1 gallon bottles too.
I wouldn't recommend it on your first go-round, but if you have smaller vessels and want to experiment, you could try different yeasts with the same type of grape in 1-gallon carboys (as well as other 'experiments' with blending, MLF, oak, aging, etc.). There is enough to learn and struggle with the first time that I would strongly advise you to keep it as simple as possible - one varietal, one yeast, one carboy, one process rather than varying it with different 'test' batches.
The website's description of winemaking from grapes is pretty complete; simplified down to the basics, but you'll discover it is not quite as easy as that makes it sound
. There is always a problem or two that crops up; experience is a great teacher, of course. And it doesn't address the various 'options' available to you when making fresh grapes compared to kits - for example, what kind/toast and how much oak, how long to leave it in contact, etc., but keeping it simple will give you a baseline and not be as overwhelming.
There are quite a few other folks on this forum with a lot more experience with fresh grapes/juice than me (two 'harvest years' of making wine with grapes), so don't be afraid to ask. I recall some of the basic problems seemed like there should be an obvious solution (and there was), but it wasn't obvious to me! Once you get past the pressing stage and it is aging in a carboy, the process is the same as with a high-end kit - bulk-age it for 9 months+ and rack it every 3-4 months with a little sulfite (if necessary). Good luck!