A kit is usually a good project. The only barrier is the tools you will need to complete the job:
- decent soldering iron. Something like the Weller WLC100 or better.
- multimeter. The guys on prodigy-pro will help you debug problems, but without a multimeter, you will have no information to help troubleshoot.
- drill press & step bit for drilling holes in the case. If you want to mount something like an IEC power jack, you'll also need a punch, and for stuff like VU meters you need a milling machine.
- hand tools: needlenose pliers, clippers, wire strippers.
If you have friends with that stuff, you can save quite a lot of money.
The only downside to this project is parts of it will be expensive (transformers). Also I don't know if the PSU PCB is part of the kit, but there are plenty of PSU PCB kits out there. Fivefish offers one, but I don't know if it's appropriate for this kit--it's a +/- supply for an opamp, whereas I think the Great River is class A discrete? I don't really know.