Those look great to me, first attempt or not (I wouldn't have been able to tell). About how much would the solution to make one of those prints cost? I've always heard people talk about the cost of Pt/Pd which makes sense given the materials but I've never actually looked into it enough to work out a per-print price. My current processes are so cheap that I've never even considered it.
Speaking of which here's another toned cyanotype, this one was originally a 35mm negative so this print represents a 14X enlargement, and I think it holds up pretty well.