Okay I finally did this earlier this year too and it took quite a bit less than that. Started with impulse buy of invert at an online auction end of January. Installed last panels end of April. 3 months. Quite a bit of it was waiting for third parties or just me being lazy and not ordering parts I needed. I've wanted them for years beforehand so I did some research.
For actual labor - it's about half days to install roof racks (I have shingle roof so quite a bit of time on angle grinder). Another half day to put panels on (requires 1 or more helpers), run a cable thru roof space. I've installed 12 panels on 2 facia.
My hack was hiring electrician to install inverter so I can export to grid (I'm in New Zealand).
For actual labor - it's about half days to install roof racks (I have shingle roof so quite a bit of time on angle grinder). Another half day to put panels on (requires 1 or more helpers), run a cable thru roof space. I've installed 12 panels on 2 facia.
My hack was hiring electrician to install inverter so I can export to grid (I'm in New Zealand).