I'm totally new to this, but here's my take on all my hobbies. Once you have the equipment you are at least breaking even, but likely saving, and in my experience the quality is usually incomparable to what you can buy. Meaning way better.
Say you spend $150 on a good kit and yield 26 bottles. That's 5.76 a bottle, minus consumables. Corks, labels, cap, etc. I usually buy bottles in the $10 range so even adding a big percentage for consumables I am still saving/paying off equipment. Used wine equipment can be found in as new condition, dirt cheap. I bought 2 separate kits from people and have three of everything and hundreds of bottles and about 10 carboys. If I lose interest, I can sell it for what I bought it for. It's an option to knock down your overhead.
Here's the big thing, though. What can you do these days to entertain yourself for $150 dollars? A nice dinner with drinks? Can you even go to the movies for less than $100 anymore? It's gonna be a one shot evening of entertainment at best.
Now with that in mind if I end up making something that would compare to a $30-40 bottle, well sounds like I'm winning. Is some of the stuff you are making so unique you can't even buy it?
I will never recoup the $2500 it cost to build my greenhouse. The cost of my root cellar was about $4000. Amortize that over any amount of carrots you like. I am never going to save over store bought. However! I am still eating 100% natural, organic carrots, beets, potatoes, tomatoes, tomato sauces, canned and fresh, from my garden and will until fresh ones are coming out. They still taste better than any store bought produce anywhere. The quality can't be matched, nor the health considerations. The cost doesn't even factor in, or the enjoyment of doing it.
Lastly I consider the fact that my hobbies are not taking me outside the home, they are actually giving me something to do and share at home. Can you put a price on enjoyable time spent together? The products of a $150 can be enjoyed over many nights. Add how it can enhance meals, liven up getting together with friends. If something turns out great isn't sharing it more exciting than opening the finest store bought wine you can imagine? For $5.76 per bottle, I might add.
I am a business owner, so I am all about spread sheets and balanced accounts, but sometimes we need to consider the invisible value that something is bringing to our lives.
If consumption is a concern, maybe some ground rules are something to consider.
Anyway, that's my $.02. You can take it to the committee!