Answer:
Buy furniture, blinds, technology, etc, that was produced in 1961.
They would likely have to be bought secondhand if you want them to be authentic since I doubt stores would stock old furniture. (Maybe thrift, I dont know)
Explanation:
He took exactly four years
Well, if you want, you need the right software to begin with. Then, you want to read a manual on it, or just use YouTube to figure it out, but the software is most important. Then, just use trial and error.