I only have like 70 multi. It's actually kind of funny, I was just working with an instructor who was like 800 hours and only 70 multi? But honestly, I have never really seen a need to fly multi (at least for my purposes) because all the singles I fly will outrun almost all twins short of a baron, and still come damn close to the baron.

Regarding how I got 800TT w/o instructing, to be honest w/ you I'm not completely sure. I have been flying since I was about 10 years old (taking dual w/ an instructor until I got my student license), so a few hours added up there, but I think the majority of it has been recently working on ratings (Instrument - CFI, CFII, MEI, etc...) and taking trips out to California, Oregon, Minnesota, etc...