What do I do?

Being as there are thousands of followers on here maybe someone can give me some ideas.

I have been married to my wife for 3 years now, together for 6. We have 3 amazing children. After the 3rd child she became a stay at home mom due to childcare cost. I couldn't do it, it's a rough job.
I work 42 hours a week and we are not rich by any means, but I can afford to treat her to a good Valentine's day.
Problem is this this year. I had a back procedure scheduled for when 2/14/18, you guessed it. She was a great wife and said oh well, you health is what's important. Now I have had the flu for 3 days and not showing signs of getting better. Doctor says I can return to work on 2/14/18, but if I am better, I have my back procedure. So long story short, no check this 2 weeks, and I want to do something special for my wife for all she has done, and will do.
What is a cheap, but not cheesy thing or place I can do or take her to locally?
She deserves something, and I can provide much, but I want her to know I love her and think of all her good doings on a daily basis. She is APPRECIATED!