I started on my 240 in February of 2000 and gave up on the rust repairs when I got the 260 in December of 2001. So I haven't had the 260 a year yet, just seems longer because this is the part of the restoration I despise.
I know what you mean about collecting parts that does help. I'm working on suspension components and have the coil overs, sway bars, Tokico Illuminata's and a CV joint R200. Let's see there's urethane bushings, CV adapters, 280 stub axles, adjustable control arms, brakes, ball joints and tie rods to go. It's easier to think about it one piece at a time or it gets depressing.