Prove that the inca were freeze drying....since it requires vacuum and extreme cold.
Freeze drying set ups cost a bunch of money. Since this person couldn’t afford much in e way of canning supplies they sure couldn’t afford a freeze dry machine.
I note that Ron Paul is now hocking these.
Inca type freeze drying only works if you live atop the Andes Mountains. Otherwise, you’ll have to invest your life savings into a modern machine.
A trip to the thrift store will find yourself in the pressure canning business for very little money. Or ask around and someone will likely give you all their supplies for nothing just to get it out of their attic. You’ll need to buy fresh rings and consider getting the used pressure canner safety checked at the county extension office (if you can’t find the office in the phone book, ask a 4-H club). Important must is a new, not older publication, Ball Blue Book - https://www.amazon.com/Ball-Blue-Book-Guide-Preserving/dp/B00OEJZSNW/ref=pd_cp_14_3?_encoding=UTF8&pd_rd_i=B00OEJZSNW&pd_rd_r=PRHAD7HVWBR6T7HCVFKS&pd_rd_w=F4FJN&pd_rd_wg=avfG9&psc=1&refRID=PRHAD7HVWBR6T7HCVFKS
Susan’s site is great for everything garden and food storage as she does the research and explains the whys and why nots - https://www.youtube.com/user/imstillworkin . And her honey’s site for gardening - https://www.youtube.com/user/mhpgardener