Don't want to be tied to one or the other

I'm considering 2 projects at the moment, both of which would be "info products".
Project #1: One is a book/booklet I wrote some years ago on weightloss (something that worked for me & I'm convinced it could work for many others). Except for a couple classified ads in local papers 9 or so years ago where I did sell a few copies, I never put any effort into marketing it. I still have copy around here somewhere. I'm considering bringing it back to life as a 30-50 page booklet or maybe a "downloadable ebook" (is that what they call it?) and if I do I suspect I'll be looking for back-end products (what type I'm not sure). I'm seriously considering putting up a website and making a go of it ... BUT: Is there a way to keep from being tied down to it like a full time job (I don't care to be a weightloss "guru" making zillions, just extra income allowing more time for family & fun)... ideas/suggestions?
Project #2: In an attempt to escape 20+ years in sales/marketing in S. Florida, I decided to go out and "paint houses" with a friend from church for just "6 months" or so. Instead it lasted 6 years (before I moved to Georgia recently). Here I sit with all this knowledge rolling around in my brain like: "the secrets professional painters use to make your house look so good" and "how to start your own painting business without really trying" and "how to double your painting business income by learning the simple art of Faux Finish painting"... wondering if that might make a good info product.
In both cases, what I'd like to do is be able to put it together and then put them on auto pilot as I move on to other things. I get bored to easily to keep up on maintaining a constant flow of info to either one. Suggestions?