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Why not add a check box at top of main screen Armory GUI : "Check if you want to support Armory developpement, this will add a 0.001 BTC fee to every outgoing transaction and send it to dev team" ?

Privacy leak, bloat/increased fees and small outputs are expensive to consolidate (ie most of the value will go to miners). Also, mandatory donations are a contradiction.

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Again, perhaps the income is not worth the hassle. Sadly. Armory is a great part of the Bitcoin infrastructure, but very very few open source projects are able to generate enough income to actually pay a developer.

Every penny counts, but there are some circumstances to consider. First of all, Bitcoin isn't really suited for many small donations. I guess I could setup a changetip account which will avoid all the on chain consolidation, but suddenly I have to dedicate time to that stuff. I like to take my time and weight out each option properly, and I just don't have the brain cycles to deal with that atm.

Next, I won't setup a donation address until I'm happy with the level of my contribution. Currently I don't want to think about that until the new wallets are out.

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And a decent programmer probably costs around $100 per day.

Far from it. More like $100/h. I could fetch that if I was to look for a job right now. Decent devs in this space start around $50/h. You also have to keep the balancing act in mind. You can get cheaper hires but they will most likely have no experience in crypto nor BTC. It will take months before the guy is productive, and everything he submits you have to thoroughly review meanwhile. That will impact your productivity doubly, for the time you spend training him, and the time you spend watching over his shoulder.

There is currently too much technical debt in Armory. I can't afford to divert time to look for, evaluate and train candidates.

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I may not post much but I do frequent this subforum and I am interested in supporting this project.

There are other ways to contribute besides direct donations.

You could petition Theymos to get me or a veteran member elevated to moderator. It would be very useful to be able to set stickies on this sub forum.
You could participate to testing phases and review code.
If that's not your cup of tea, you could write tutorials for Armory.
You can also try to isolate and reproduce specific bugs and report your findings on the issue pages of the github repo. This would drastically reduce the cost of fixing the bug on my part.
If you have some web design in you, I would consider setting up a gh-pages branch and merge in yours PRs. This project could definitely use a webpage. It would be pretty cool if it was community managed too.