Will this become available for purchase at a later date? :3

It's technically up for purchase now, but I think I know what you mean.

I haven't released any of my bases (Aside from maybe one very old one) to the general public I think ever. I don't intend to start now without reason, but meh, never say never. :P I like offering my bases for a fraction of the price most bases go for and Patreon is a good platform to allow that, so no plans to change.

I see, thank you for the informative reply!

Hello, I offer my bases on Patreon. ^^ Thank you.

can this be bought outside of patreon?

I answered this in the comment right above you.