The key to getting the research materials (it will take f'n -weeks- to research with just you to get everything) after you run into the ancient books, engineering manuals, and AI cores, you can train your guy to basically be super ninja thief crossbow wizard. What you do, is run around encumbered to get your Str up (might already be; 40 is decent) then get athletics up super high (70/80s) as well as your stealth (not as high, but high) and go around equipping all the +stealth shit you can, that doesn't have major athletics negatives. Go to that scrap town or one of the other "out of the way" places that aren't near the newblar starting areas (That place in the fogman mists way up north tends to be decent) and get yourself a good crossbow. The sniper ones are good, but with what you're doing they actually take longer to kill things with and level up because of the long reload times) Something that uses regular bolts is probably fine; that's what I did.
Once you have that, and your stealth is capped or near cap, go around hunting ancient ruins. You'll need some pretty high lockpicking (but you're a thief; may not matter at this point) or to keep a couple of "Tools" on you (they show up a lot at the ancient ruins/libraries in my experience) and begin to pillage the world. The robot spiders and shit that will chase you around move slowly and you can easily kite them to death, even at low skill. You'll get past the manual/ancient book phase pretty quickly (except when you get back and have to research for a week IRL time straight). Then, you go to ashlands and raid the skeleton hives for the AI cores. Can easily be done with one character, and there's plenty of greater than 100% stealth gear out there to go from even a score in the 60s up to 100 (cap). This has the added benefit, if you are very high on athletics as well, as having you move -faster- than you can normally running while in stealth. Straight up anime-ninja-arms-to-the-sides shit.
I have a full city doing all the normal city things, but a straight up cold blooded ninja that I send out to collect research materials. Haven't done any of the cool boss kills really; got into sim-city lite and defending it from Christians and Ninja-Thieves has been pretty fun.