I think as long as you're not setting out to start a tech company with thousands of employees, or branch out into a sector with the word "cloud" in it, you'll be fine. Only unreasonably big ambitions cost billions.
A project is usually on the road to success when it starts with a disclaimer like "just a hobby, won't be big and professional like gnu".
I think a larger concern is how you'll address the Bus Factor going forward.
I recently put some effort into making it possible to run and host the system fairly easily[1]. That said, serving basic search data and operating a search engine is two different things. To do more than index a couple of blogs you inevitably need a fairly deep understanding of the system, probably decent hardware, and so on.
But the long term goal is that this is something that's relatively easy to operate and extend.
A project is usually on the road to success when it starts with a disclaimer like "just a hobby, won't be big and professional like gnu".
I think a larger concern is how you'll address the Bus Factor going forward.