As a newcomer to this industry, I am searching for an affordable VoIP VPS that will enable me to establish an SMS service for incoming and outgoing messages. I am not interested in making any phone calls, only utilizing a communication layer 3 DID number as a means of communication. Can someone assist me with this request, please?

May I inquire about your question? If you're considering selling another company's service, then reselling may be the most suitable option. However, please note that this can be a challenging endeavor and we may not be able to provide all the necessary assistance in one discussion. It's certainly something to carefully consider.

Conducting market research, identifying potential competition, and determining profit margins should all be taken into consideration before making any decisions.

There are several affordable VoIP VPS providers that can help you establish an SMS service for incoming and outgoing messages. Some popular options include Twilio, Plivo, and Nexmo. These providers offer APIs and tools that allow you to easily integrate SMS services into your application or website. It's worth noting that while these providers primarily focus on SMS and voice communications, they also offer additional features such as phone calls if you ever decide to expand your capabilities in the future. You can compare their pricing and features to find the best fit for your needs.

Here are a few more VoIP-based VPS services that also offer SMS inbound services:

1. Voximplant: Voximplant offers a cloud communication platform that includes SMS capabilities. They provide APIs and SDKs for voice, video, and messaging services, making it easy to integrate SMS functionality into your application.

2. Telnyx: Telnyx is a global carrier that provides VoIP infrastructure and APIs for voice, messaging, and fax services. They offer SMS-enabled phone numbers and APIs for sending and receiving SMS messages.

3. Bandwidth: Bandwidth is a communications platform provider that offers voice, messaging, and emergency services. They provide APIs for SMS messaging, including the ability to send and receive messages using virtual phone numbers.

These providers should have the necessary infrastructure and APIs to help you set up your SMS service using virtual phone numbers. Make sure to compare their features, pricing, and support options to find the best fit for your specific requirements.