I understand you, in general, this is a very modern programming language and few people use it. I found https://crocodelab.com/typescript-development//. They also created an application for my business with a large load and various details. We got the job done and still work with them.

I'm wondering where in San Diego they professionally produce high-quality banners, stickers and stands?

Of course, this is very effective, you shouldn’t doubt it so much. I can also advise you where to get stands for them https://urbansignandprint.com/collections/banner-stands . In general, the company is excellent and prints banners that are exactly what you need. This helps increase your visibility.