ANSWER - This will sound harsh but I'm going to quote a very good friend of mine to you- "If you want to do something enough you'll find the time to do it. If you don't have the time, you simply don't want it enough..." I've resisted this advice more than once in the past myself but this particular friend doesn't allow me to wallow in the self indulgent misery of thinking I haven't got time for all the things I want to do with my life. And you know what - she's right. I despaired of ever fitting in writing my novels what with the website, family commitments and the full time job but once she gave me the knowledge that I could do it I stopped asking the question "Can I?" and started asking the question "How can I?"
Which brings me to the other thing she likes to say (full of cliches this friend...) "You can't increase time, you can't reduce time, all you can do is shift it around a bit." Again, she's right. You have to look at your day and identify the dead time. Everybody has patches of time that they don't use effectively - identify where these are in your own day and vow to use them more constructively.
I think you would also benefit from looking at this problem from another angle. Being a witch is not necessarily something you set actual time aside to do. A witch incorporates her craft into her life not vice versa. Look at the things you do in your day to day life and think of what you can do to make those tasks more valuable and more fulfilling. A witch doesn't "clean" the house, she purifies and cleanes the house be it with oils and vapours, be it with a flick of the old broomstick or be it with intent, charms and chants. Same with cooking to give you another example - work a little magic into your cooking (or your sewing or the day to day business of your full time job.) Basically what I'm saying is that a witch doesn't necessarily do anything different, she just does the same things as everybody else but she makes them different by virtue of her purpose and intent.
You've got time to be a practising witch because you can do exactly as you do now and you need change but the attitude you are doing it with.
Image http://www.deviantart.com/art/The-Wiccan-306870964 (Xyldrae)