Variety is key, as others have said.

If money is tight, do a search for LC on a budget and you will find a number of threads that have a lot of great suggestions about saving money.

There's no denying LC takes a lot more preparation for many of us than our old eating habits. You have to do some things differently to make sure you always have good food on hand. Making up batches of things and cleaning and preparing veggies to have on hand pays off by making this WOE easier, and if you do it right it will also save you money.

While groceries may seem higher, remember you're not eating out as much probably, or ordering take-out or stopping at the 7-11, etc. These things added up too.

Good luck. I just took it day by day in Induction. I focused on getting through the next 24 hrs without cheating and not thinking too much about the long term. It got easier every day!