Overall it took me the lion's share of a year. Mostly working for a couple of hours in the evenings.
since you had a rare chance to rewrite a whole thing... what did you choose to do differently this time?
With Hi.Events, I designed the API first, making it more robust and open to extension. One of the most frequent requests for Attendize was for more flexible ticketing options, such as ticket tiers and donation tickets. I've incorporated these features into Hi.Events, along with much more powerful attendee management and customization features.
We're still in alpha, but we'll have a beta cloud version soon, so be sure to check back in a few months!