Post a wtb on pinside or RPG archive for a routed TAF. Let them know your location in the post. Decide if you are willing to pay shipping or if you are looking for local/pickup only and how far you want to drive. Shipping a pin can be 400-600$.
As far as repairs- you are capable, just use the resources and advice that's available. The trickiest mechanical things are general board work (how comfortable are you with board troubleshooting, replacing components/soldering). and playfield wiring/switch troubleshooting.
The cosmetics can be involved as well. If the pf needs touchup that's a bit of an art to itself. if you do touch ups, you'll have clearcoating required. If the cabinet is damaged, you're looking at decal work on a TAF, which is expensive and labor intensive, plus if you jack up a $300 set of decals . . . ..
My advice: get a cheaper, complete, partially working Solid state machine for $3-600 dollars to start with/to learn on. There are many reasons that these are easy to work on, mainly they are simpler overall. Pinballs are more complex that vid's and not for everybody to work on. Don't restore a $5K machine as your first one. I'm restoring a pinball that I bought for $100 as my first one. Gameplan sharpshooter.
I don't consider $5k for a TAF a good deal even if they cost that much. you can get much more machine for less esp. if you are willing to work on it. And wait for local deals. I got a fully working, decent DE Tommy for $800 a while back, which is a top 50 machine in anybody's book. I was patient and watched CL like a hawk.