Reddit mentions of The Homebuilt Winery: 43 Projects for Building and Using Winemaking Equipment

First, get the book The Home Built Winery. Inside of there, they have a large cabinet/closet that you can build that will help you store your containers in an organized manner, and keep the temp controlled. Then build a crusher and press, and anything else that you think you may need. Don't forget, you're going to need a lot of carboys and/or larger containers that will fit in your storage closet.

I'd want a good pump and a great filter system and a better way to bottle and cork.

As for a kegging set up, you should look at the homebrewing sub-Reddit, they build kegerators all the time. But you're going to have to use something other than CO2, unless you plan on only serving sparkling wine from the kegs.

Edit: I also forgot to mention that if you plan on getting bonded, then you're most likely going to need a sink in the garage.

Hah, that is fortuitous. That being said, I wouldn't exactly call myself a winemaker yet. I am like you in that regard! I just said wth and planted a bunch of grapes because I like wine and am just hoping that I can get a drinkable product!

The best piece of advice I can give you is to read. I have done a lot of that lately. My favorite three books on the subject are:

https://www.amazon.com/Vines-Wines-5th-Complete-Growing/dp/1612124380/ref=sr_1_1?ie=UTF8&qid=1495465433&sr=8-1&keywords=from+vines+to+wines

https://www.amazon.com/Organic-Backyard-Vineyard-Step-Step/dp/1604692855/ref=pd_bxgy_14_3?_encoding=UTF8&pd_rd_i=1604692855&pd_rd_r=GGTRVNRET3ZF1BVFRGQH&pd_rd_w=mHT9B&pd_rd_wg=NG0Ym&psc=1&refRID=GGTRVNRET3ZF1BVFRGQH

https://www.amazon.com/Homebuilt-Winery-Projects-Winemaking-Equipment/dp/1603429905/ref=pd_bxgy_14_img_2?_encoding=UTF8&pd_rd_i=1603429905&pd_rd_r=VJW281V3B49SSHRVTPND&pd_rd_w=5ERKw&pd_rd_wg=makHZ&psc=1&refRID=VJW281V3B49SSHRVTPND

I know that you can source grapes/grape juice from various places on the internet. I cannot speak to their quality. You might even be able to find someone in Texas who is growing and might sell you some. My guess is it is going to be the hot varietals down there! Given your background, I think you should figure it out in no time!