As a shoe repairer and maker, this seems like a good starting place. The Landis machines are the most popular and spare parts are readily available. I'm not familiar with the #36 machine but the Landis 12 K Outsoler is a great machine. A line finisher is of the older style of finishers, totally fine but the modern ones have more options and can take up less space. I run a line finisher but am always looking for a newer one to upgrade to.
For most consumables I am sure there would be a local supplier that sells sanding papers for the finisher as well repair components like heels, soles etc. Maybe https://www.labellesupply.com/
SRI (Shoe Repair International) is a great resource, but it is a Facebook group and membership is limited to people actively in the trade (or adjacent trades).
Also https://thehcc.org/ is a forum of mostly traditional shoemakers with heaps of info.
To round out your repair operation you would probably want a patcher (Singer 29K or Claes/Adler equivalent), maybe a 5-in1 rough rounder, and definitely some ventilation for all the glue. Use Renia adhesives.
To make shoes professionally you would want a post-bed sewing machine, maybe a skiving machine and of course shoe lasts.