SFI

95% of what I have learned about (reset) preferred's I have gleaned from his website/blog....
(Based on a ? 2014 RoB article I found on Google)
They only caught my eye as rates hit record lows in Febuary/16...(they were at a bottom imo)

Maybe he could update his "list" of preferred's a bit (!!)...but otherwise his blog/site is an excellent resource.
He has an deep (and shared by me) interest in corporate debt, and bond ratings as well.
A cautious/skeptical  type.......which I appreciate.
I consider him an expert.

As for his fund....I am sure it has had a fabulous 2016...:)
It is run basically as a 5% (+) income fund,as I understand it...sort of a laddered pref share ETF although I am sure he would hate that term.
Personally I am a DIY type as you know :)

PS
 I see (pretty good) trades in my account on ALA.PR.E and PPL.PR.E in March/April in 2016...so I did a bit better than your calculations :)
Should I have invested more...?
probably
Hind site is 20/20