Not much there not to like...to be really picky two rack bosses at the top of the seatstays would be nice...but P clips will do fine. Nice classic steel frame, you will have loads of fun!
If you build the bike up yourself you will understand everything about it and therefore be able to fix any problems you encounter on the road when touring.
Merlin Cycles are doing complete Deore drivetrains for £150 or so at present - they are a doddle to build up and you would be pushed to buy retro bits complete for £100.
Add some secondhand bars, v brakes and saddle to choice. I can help with a secondhand rack for postage if you need it.