I have several Broncos in various stages and I document everything on Mircosoft Word because I'm not great with Excel. I have a manilla envelope also that I keep the reciepts in. I could've had one really nice Bronco by now but instead I've spread the $$$ towards each one, wouldn't do it that way again but too late.
Estimate about $35k for a frame off that has some good parts and a few nice things. Save money on the things that don't matter on the build such as keep the open diffs or factory limited slip over an expensive locker if it's a street rig. Same thing on transmission choice, a three on the tree is fun and unique now days - unless you need to drive on the highway plus stop and go traffic, then get an OD tranny if you wish. A soft top is about $600 but the body work on a hard top could be about $3000. Do you need a full cage, bumpers, winch, and all those things that add thousands to the build for a truck that will never go off-road? Do you need HID headlights, carpet kit, all new seals/felt/lenses/plastic pieces or whatever you have never even thought of? What I discovered is I don't really want to take my Bronco off-road and dent or scratch it up now that I've paid a restoration shop about $15k and put $20k in parts on it. I'll stick to the lighter trails (2-3) and hopefully pass it on to my sons.