“If I only had an original idea, I’d start my own business” is something I have heard over-and-over.

You don’t need an original or unique idea. You need an idea that you will follow through on and do better than most others who are doing it.

OP, what are you doing now for a living? What other things have you done? What hobbies are interests do you already know about? Can you already identify some kind of business where you think “I could do that better?”.

I’d pack every square inch of it full of random shit my family has acquired over the last several decades that we cannot seem to throw away.

That’s actually MY plan! I just bought an 1,800 square foot tear-down house to do this!

I’m kinda, sorta not kidding. I bought a house built in 1952 on a block where all the other original old homes have been torn-down and replaced with $3MM to $4MM new homes. I’m speculating on the value of the lot increasing, but for the next few years I’m going to use it as my office, workshop and storage space. Taxes and utilities should be less that I’m paying in rent now.