Feasability of this selling strategy

Hi there. Thanks for reading and any feedback. I have a web app that I had planned on selling via AWS and Azure but their requirements are aimed at much larger businesses which I cannot meet at this time. DigitalOcean seems like it might a good alternative but I am struggling to learn much detail about how feasible it would be for my situation.

I need buyers to be able to integrate my 1-click app into their internal networks by VPN, not Internet access. The VPN cannot terminate on the droplet. Based on this constraint is there a way to accomodate it using DigitalOcean products or services?