With Teespring I recommend group orders such as for family reunions, bridal parties, memorials, birthday t-shirts for party favors, etc.
If you can't order all the items at once, pass the link on to your group members so they can place the order themselves and let them know a timeframe to place the order so you don't have to wait a long time to get the order. I recommend telling them to order within 3 days of getting the link.
Here's the links to the two storefronts I have so far. Contact me at BIZINTEL66[@]gmail.com for requests. Take the brackets from around the @ symbol BEFORE sending the email.
If you want a specific design that does not fall into the technology or ethnic category, don't worry, I design other graphics as well. :-)
Hope to work with you soon.