After some researches I ended up with Wallabag as well, hosted on wallabag.it.
I've got a lot of things saved, sometimes quite long articles (I read a lot, but I save a lot more)
The ePub export was a requirement for me since I moved to Kobo (originally for the Pocket compatibility) after old Pocket app on my 1st gen iPad Mini stopped working.
I made some test to self host it but the epub export and the images caching was to much for my Synology NAS. I had some good results with a more powerful machine but I didn't want to keep it running 24/7.
And finally the export works well on wallabag.it so I though the hosted version worth its price!
I totally recognize myself in what you are saying.
I'm waiting to finish my current project (I do freelance contracting) to be able to get back on my own projects and focus on something... but I have the same lake of good ideas lately, or at least I don't really believe in my ideas anymore.
You should consider working on really early stage projects, building MVPs, maybe for equities rather than money.
Mac Mini with a wide screen (>22") + an iPod touch as testing device may help
keep in mind that you can run Windows or even Linux on a Mac if you're into that.
The hardware will handle it pretty well.
I'm an experienced iPhone/iPad developer.
I'm also able to work on backend (Rails), web development (Rails/PHP) and system administration (Linux, Mac OS, and Windows)