Does anyone have experience, good or bad, with Horizon Trust?
In case anyone is interested, I tried to find and interpret the fee schedules for the five self-directed IRA custodian services mentioned in the blog post I linked above.
Don't take my word for it on these numbers, because I can't guarantee that the documents I found are necessarily the company's current fee schedule in all cases, plus there definitely seemed to be no small degree of interpretation and apples-and-oranges effect in trying to force a comparison in some categories.
Also, Quest and Horizon, at least, offer some alternative account options where you can pay some version of fixed fees or higher minimum/annual fee, in exchange for lower sliding-scale account fees, or no per-transaction fees, etc. Horizon's was the most difficult fee schedule to find (I ended up having to Google it, after failing to find an obvious link for it by browsing their site), but if I I found the correct and current one, and if I'm interpreting it right, it seems like if you anticipate having a upper-5-figure (or higher) account value, and having relatively frequent buy/sell transactions per year, they might have the lowest effective cost, if you go with their Platinum plan, which is an alternative price structure that I did not break down in this table.