Any recommendations for Java hosting? Most PaaS I have looked at seem to have a very steep price increase from self hosting. For example Heroku presumably is 50

Any recommendations for Java hosting? Most PaaS I have looked at seem to have a very steep price increase from self hosting. For example Heroku presumably is 50$/month, when currently I get by with a 7$/month VPS. And the next level would already be 250$/month. I also find it very difficult to make the transition because of the different types of units. How much RAM and how many "dynos" (whatever) will I need to get comparable performance to my VPS? Worst seems to be Google where I have no idea how much it will cost me in the end. I don't care about prices per second for all sorts of individual things (RAM, CPU, Storage, traffic - all priced by the second or other units), I just want a fire-and-forget flat fee that covers my needs with a reasonable buffer against spikes in demand. That said, of course the price of VPS is also high with the required time for maintenance. At least it is also a learning experience.