i completely understand your frustration. i dont know of anyone who is "caught up" with everything. But that is one of the things that makes this hobby fun- there is always something to work on when the inspiration hits.
i have been in your same place before- about wanting to quit, and looking at all of the money you have tied up in stuff. but it wasn't until my brother in law was "helping me" (sitting at the kitchen table) while i worked on a christmas present for my grandparents, that i gained a real perspective on it. my family (esp my sister) likes to ask how much $$ i spend on this stuff, but when my BIL asked me- i gave him my defensive answer-- to which he replied, "it was just a question, i mean think if your hobby was golf, how much $$ that is. And I spend a lot of money on cooking gadgets because that is what i liike to do"
completely cheered me up. too bad golf and cooking are my other hobbies (yikes)
but anyway, the point is, if it isn't fun for you anymore, then stop or take a break. that is the point of a hobby
hope you cheer up