I figure if I stop subscribing to several things on Roku that I rarely use anyway, I will make up most of the cost of Sling, if we decide to get it.
It could be good for your needs. I only have two things I suscribe to on Roku. I also have Prime video.
I use Amazon a lot because it is great to have deliveries on items I need at home because of health issues. Particulary in winter months.
I kept Sling Blue for 4 years. So, I was okay with it. I was just not using what I was paying for.