If I had to choose to keep only one camera it would be the Polaroid SX-70, hands down. I remember how devastated I was in 2008 when Polaroid discontinued Time Zero instant film for this camera, thus turning them into Ebay items of historical interest only. This all changed again with the birth of the Impossible Project:
The Impossible Project was founded in 2008 after Polaroid announced in February 2008 that it would stop producing film for Polaroid cameras. The founders are Dr. Florian Kaps, André Bosman and Marwan Saba. In June 2008, Kaps and Bosman met at the Polaroid factory’s closing event and decided to found a company to produce materials for Polaroid cameras. In October 2008, Impossible bought the production machinery from Polaroid for $3.1 million dollars and leased a building, called Building Noord, which was formerly part of the Polaroid plant in Enschede, Netherlands. The company has offices in Vienna, Berlin, New York and Tokyo. It leased the Polaroid production plant and developed new instant film products for use in some existing Polaroid cameras, beginning mass production and sales in 2010
As I have mentioned in previous posts, Impossible Project color and black and white film is very different from Time Zero film. It has a range of eccentricities and peculiarities that require adjustment from those of us that shot Time Zero film, including a hefty price of 23 USD for a pack of 8 exposures. Truth be told-most of us would pay twice that to keep this medium alive for creativity.
The other requirements for SX-70 work are a good flatbed scanner (I use the Epson V700) and Photoshop (I use the current version via annual subscription to Adobe Cloud).