HI J.,
Lots of good suggestions here. Almost everyone universally wants to be acknowledged, accepted, appreciated, and have affection. If you plan your celebration with that in mind your husband will feel loved, and especially blessed to be loved by you!
How to best do that is the key?
Give some thought to what things your husband appreciates most? Most of us have experiences that make us feel appreciated, valued, acknowledged and loved. We tend to express our love and appreciation in the ways that feel best to us. For instance if you really appreciate someone doing little things around the house, then you tend to express your affection by doing little things (acts of service) for others. You might gets hints about your husband's 'love language' by thinking of the ways he expresses affection and appreciation for you.
Gary Chapman author of the "Five Love Languages" breaks it down into five different categories. "Quality Time, Acts of Service, Words of Affirmation, Gifts, Physical Touch". Of course we each might appreciate all of these in different levels and varying degrees but there will usually be a top two.
Consider planning your acknowledgement around the ways that you believe are your husband's love language. If you Google it, you can find lots of more information if you have any doubts about what his love language(s) may be.
So for instance, if he most values words of affirmation, then be sure your gift includes expressing (saying or writing) much of what you appreciate about him. If it's touch, then you could include a warm towel and massage. If it's quality time, then plan plenty of time to do whatever it is he would most like to do. If it's acts of service, then think of things you can do to make his life a little easier or to surprise him.
When it comes to archetypes I think most men love to be acknowledge for their role and importance as 'heroes' to their family, and especially to their wife!
My daughter made a photo montage for Mother's Day and Father's Day, a variety of photo images with music playing, where they fade in and out. You can do one for free on most photo sites included Walgreen's com, or on your own computer. I think Windows will do one for you automatically too. You can choose meaningful music and that is a gift that your husband can enjoy for many, many years.
You might want to put something together for him as a keepsake with the idea of "Legacy" in mind. The gifts he has passed on to his children, to you, and all the lives he has touched. "Every-Day Heroes" The people who do what needs to be done every day to keep our families happy, healthy and together. Creative ways to let him know that all his efforts have made a huge difference and will continue to influence the world for generations.
You mentioned keeping the price down so I assume that many sacrifices have been made to have the kind of family that you guys value and appreciate. There are many ways to acknowledge those sacrifices.
The people that invented the game Monopoly did so because they had been planning a trip but found out they were going to have another baby and their plans for great adventures and 'abundance' had to once again be put 'on hold'. So they created a game where they could imagine all the things they 'might' have done.
Many parts of your theme could be based on something like that as well.
Hope this helps!
Let us know how things turn out.
Congratulations on your many accomplishments!!! Being a Mom is 'the toughest job you'll ever love', the Marines just stole our 'tagline'.
Many blessings J.!