id:austinburk, thank you for answering my questions.
I had read your reply with caution.

>1. Yes, I am confident.
>I will aim to make the site as close to this one as possible, so that it is easy and pleasant to transition.

At the first, I want to say "Thank you".
I am very glad that you are confident to make new hatena haiku until until 27 March, 2019.

>2. I must reimplement the Hatena Notation parser (I will redo https://github.com/wakaba/perl-text-hatenalite)
>which sounds like a rather hellish task.
>
>I don't know how I will send custom notifications to Hatena::Notify. From extensive research and testing,
>I know of a few tricks I can use to make things show up on it, and I can attribute authorship to users on Hatena Star.
>I am confident that I will figure out a way to do it, though.

But there are some problem on your project, especially, they are in
"Hatena Notation parser" & "custom notifications to Hatena::Notify"...

For me, reimplement of "Hatena Notation parser" seems impossible!!

But, In my understanding, it must related with Hatena Star's function or something.
And it will be needed to make new Hatena Haiku, I think.

>3. I'm not sure. It is most likely my busy schedule.
>I have been preparing for this for a while, however, so I am not starting from scratch.

>as it is costly, so I must ask for donations and have set up Google Adsense.

Okay, all we know that you are working on full time job as system administrator.
And if you need some of Japanese user will donate your project, I think.

I will try to translate what you say to Japanese user, and I pray your project will be succeeded!

Thanks!!