I am not entirely sure what you are trying to achieve? Are you trying to host a web app in which users can train their own models on your computer? Or do you want to host a web app that uses your trained model for inference?
If you want to make you nicely trained model available so that people can use it to predict stuff, then you will not necessarily need a GPU to do so. Actually there was a nice post earlier showing how you can easily host a small classifier for free on heroku