Hi JuJu, just been reading your thread and interested to see how you get on.
I've been doing VLCD since 1 July and to be honest it's been the easiest diet to stick with that I have ever done... and believe me I've tried them all!! Started at just short of 24 stones and have so far lost just over 4 and a half stones. The first week is really hard and a long week because it is hard, but once you are in ketosis it really is easy to stick with.
I think I would find it really hard to go through that again once every 3 weeks. Have you thought about doing your VLCD week but then just carrying it on as long as you can, or just to see if it does get easier for you? I'm doing Exante and they have a good range if bars, shakes and meals so plenty of variety. I'm not much of a drinker anyway so that's not been hard to stop, but do love to socialise but I've managed to just choose low carb, normally a chicken salad or similar.
Before this I would never have thought I could do a VLCD as love my food and love the feeling of eating and feeling full, but ketosis does something to you that stops cravings... I love it! I am hoping to be at my goal weight of just under 13 stones by June next year.
Let me know how you get on. I know what it's like when you have a lot to lose, it feels like a mammoth task that will take forever! For me I want it to be over ASAP then will use 5:2 to maintain.
x