That's a futile dream, a collection can never ever be complete. Museums care about milestones in history, not a huge and boring collection of cheap items made by Chinosium companies to get the biggest profits they can.
The reality is that your collection is only valuable to you while you are still alive and invested but the second you lose interest or kick the bucket someone will just toss or sell the whole thing. Probably toss because selling and storing hundreds of hardware is a huge pita.
I say it as a collector myself, I have hundreds of processors but it's literally worthless because companies produced millions, tens of millions and hundreds of millions of the very same thing and a ton of it is still floating around. The retro hardware scene is not nearly as active as people think, this very forum only has like a 100 really active members and it's one of the biggest, friendliest international site. It's a cult that has people coming and going but the majority of people aren't THAT invested in all this, only the hardcore members whose name you see here every day under every post.
A collection is good for one thing and that's the whole point, to make the collector feel good about getting another piece of the puzzle. It's a valid reason but it's all psychological, the need to collect and gather. But to think that it has any value outside of your room is just a daydream.
Post the collection here, get your "likes", jelly points, comments and praise from the community and that's it, back to storage they go.
And don't forget, if scalpers didn't care about this then most hardware would go straight to recycling and nobody would care to get it out of the pile. Scalpers are the ones who have access to waste management sites so this entire hobby is based on their work. Without them we'd have almost nothing to play with. It costs money? Well, all hobbies do.