You do have some interesting elements going for you. That emblem is a dense design and with 10,000 stitches, you are going to be stitching a lot!
I am going to make the recommendation (I hope if anyone is aware of a flaw here, they speak up) that you use a #75/11 needle. It is good for not leaving a large hole, I would check out using a #70/10 as well. Your test sew out is really important here.
For the costs to the group, I would go with a minimum of $8.00 for the design. That works out to about 80 cents per thousand stitches and is an amount I would charge for a group with which I was affiliated***. That means, that I would charge more to a client who walked in the door. Additionally, if someone walked in the door, you would be selling them jackets so that you make some money off the jackets as well as the embroidery. If the store across the street says "free embroidery," that just means they have added those costs, including extra hooping, set up fees, etc., to the price of the jacket. Since you are in the 'starting stage' of working into a business, be careful not to just give your work away. There are ways to discuss with clients why your charges are reasonable.
If you don't see any stabilizer in a commercially produced item, there are multiple reasons for this. For one, they have someone who does nothing but clean up the design to their specifications. So, a trimmer might be so experienced that you cannot see any stabilizer. Of course, they may have used wss, but the fact is that they will not wash the item (unless requested for some reason). That is an extra step for which they must also charge a client.
I am really sold on Badgemaster for all the reasons in my blog. I can see that this stabilizer is most likely a commercial product because, after using it for over a month now, it is not just heavy, it is resilient to stretching and holds well with needle holes. You can probably tear away your current wss, but it is really difficult to do so with Badgemaster, and I end up cutting it away. That is a small price to pay for confidence in my stabilizer.
After thinking about your project, I also think it will be advantageous to baste the wss with the fabric and lining at the same time. And, after all, if you are not happy with the placement, you should be able to remove and rebasted if needed. Be sure to make a template made of a lightweight cardboard, like they put into men's shirts. You will need that for each item to be placed identically. I personally did get the Perfect Placement Kit and find that it is well designed and easy to use. I can have confidence in my placement because I am not very good with making my own tools. If you have a moment to view the video on this, you will see that it takes about 8 seconds to place an item on a shirt.
***I have costs for family (if they are nice) LOL; Internet clients; and those who are not nice to me. . . You can have multiple amounts. I also have a cost for a charity, which is just to cover my threads and electricity, etc. My time is my donation. I also give my test sew outs to some charities, I do a lot of animals, especially cats. I tell them to find someone to buy picture frames for the sew outs, have someone else put them together, and they have a very salable item. Even if they just get $5.00 for that package, it is the cause that benefits.
Pat, The Avid Embroiderer
I hope you'll visit The Avid Embroiderer my blog for some tips and tricks from someone who enjoys sharing her discoveries. Considering selling your embroidery? Check here first! My spreadsheet is just what you need!