Hello Lorena!
Events Calendar PRO and Event Tickets Plus are indeed two separate plugins with different features. In other words, you will need to purchase both in order to get the benefits of both.
We run a number of sales and promotions throughout the year and you can find the latest and greatest offers listed on our Deals, Coupons & Discounts! page. It does not appear that we have a current promotion for exactly what you’re looking for. That said, we are coming up on Black Friday and, though I cannot guarantee we’ll have a deal available then, we have done something for it the past few years, so it wouldn’t be a complete surprise if it happened again this year.
Cheers!
Geoff