Stripe Elements in Spark

Before we pay for a license of Spark, I need to get some questions answered.

First, does Spark allow for using the Stripe Elements feature? This is where the user clicks a button to purchase the subscription and it opens up a page on Stripe for the user to select one of the methods of payment we have configured in Stripe.

Second, my plan is to create a new Laravel instance on a new server with Spark, but communicating with our database. How much customization is required to connect Spark with the tables we use for subscriptions or will it establish new subscription table methods and we have to migrate our current users/subscriptions over?

Lastly, is there a bunch of design work to do to build the front end? I see on their site that they say use your front end with the intent of integrating into an existing laravel system. But in our case our currently live application isn't built with Laravel. We are getting there but it's going to be a while so I want to setup this standalone instance to work with our current database.

Thanks for the help!