You should be able to change the file handle limit without much effort? I'm not saying you made the wrong choice, if you don't have some pretty deep sysadmin s

You should be able to change the file handle limit without much effort? I'm not saying you made the wrong choice, if you don't have some pretty deep sysadmin skills, you should probably be outsourcing your hosting, but that seems like a weird justification. All that really matters is Heroku is cheaper than people. When it no longer is, you start thinking about hiring.