For Magento 1 please see: Security deposits
For Magento 2 or WooCommerce please see: Security Deposits for Rental Businesses – Tokenized vs Authorization
Yes you can. A multi-store means you have multiple store-fronts, domain names, and even design templates however they all share the same installation of our rental software. You might have something like:
Store 1 | mystore.com | Catalog of cameras
Store 2 | mystore2.com | Catalog of sporting equipment
Each store can also have a default language and currency attached to it.