Aha! I think I've sussed it!
I need to add a donor to the "Donors" user group
and change the user's "Display User Group" from "Registered Users" to "Donors".
Then the
button shows up! Thanks for the donation, Homerette! I used you for a test subject on this adventure!
That allows me to merrily report that Sun Sims (plus its companion site) is only $1,090.85 in the hole!
You might be amused to know that bandwidth isn't even on the radar. The costs are for vBulletin ($170.00), the domain names (about $1.50 per month, each), and the monthly hosting cost ($75.00 for a pair Networks high volume account).