You guys are crazy (but obviously loaded)....I'm with doc.
Engine kit: Pistons/rings to suit new oversize, pump,bearings, thrusts, timing chain, seal and gasket kit, all those bits and bobs for a new short block $420'ish
Machine shop work: bore/hone, crank main/big end journals, crack test, balance (everything) and deck $370
Valve guides: 50'ish??
RE13 and new followers: $210
Seats cut: $30
Home pressed guides: $$priceless
Home lapped valves: $$priceless
Home assembled block: $$priceless
Factor in:
Permatex No.3 (or your favorite sealant) <$10
Loctite <$10
On top of basic tools you will need access to(beg borrow or steal):
a torque wrench,
and ring compressor,
feeler gauges.
Now including the consumables, I've got that at $1100 even. You may consider replacing the clutch plate and throwout bearing while you're burrowed so deep in the engine as well..
Now there's no performance head work in there, but you've got to keep the apples with the apples so we're all comparing the same thing.
I might have forgotten a thing or two, but that is about all you need apart from a Gregory's and a sense of adventure. I love the job, it's all clunky and it's great when that engine fires up for the first time. People pay a lot for others to do all the hard work these days. The parts are still cheap for a mini, it's the labour that kills.
EDIT: I noticed Doogie included gearbox in that estimate. I just finished mine tonight, replaced everything. I have no idea on the over all cost of parts ( I haven't added it up), but the gearbox kit (for everything replaced including diff kit) was about $450 and I got a new selector fork for 1st/2nd (100 Aust from Minispares UK). Also replaced the case (thanks ballistic) and that's about it. So it's about $620. Extra clunky job however, and not for everyone. But I enjoyed it now that it's done

I wonder if it will work however...
All respect to the mini repairers who do operate their businesses. They do have families to feed, but so do I