Hi
Options:
1. Rent or lease them (amount of companies that offer this option depends on your location).
2. Purchase them second hand (there's some amazing quality second hand furniture - some of which you'll be able to sell when done.
3. Partner with companies who want to promote their products and may be willing to give you the inventory at substantially reduced prices in exchange for showing the brand/logo of the product on it or including the brands on your website.
Either way, you should get reduced rates for buying large quantities.
I've successfully helped over 350 entrepreneurs, startups and businesses, and I would be happy to help you. After scheduling a call, please send me some background information so that I can prepare in advance - thus giving you maximum value for your money. Take a look at the great reviews I’ve received: https://clarity.fm/assafben-david