@jmpreston You have a few options to overcome the Mongo requirements during the installation. The requirement itself isn't for Mongo to be installed but rather the PHP driver for Mongo,
steps to install the driver are here.
A second option is you can skip the Mongo requirement when running:
composer install --no-dev
By instead running:
composer update --ignore-platform-reqs --no-dev
Once the composer commands complete successfully you can then proceed to step 4. and run:
php artisan dreamfactory:setup
Answer the on-screen prompts to complete the installation.
I'm not sure what you mean by "Bitnami is not an option". Can you clarify?