How can I grow my email list on a shoestring budget?
You can do that for free even, but free methods often have limited capabilities. To be specific to your question, I am already doing that at the cost of a coffee mug. The results I have got so far have been amazing. I am here to tell you about some common ways of growing email lists, and a brief intro of the method that I have been using and will in the future too for growing an email list.

Anyways, if I were to grow an email list on a shoestring budget, I would apply the following tactics:
1) Impressive Web Content: That’s about making use of your writing skills, and playing with the words in such a way that the web content catches people’s attention and motivates them to give their email addresses for a good reason.
2) Digital Products: You can create a digital product such as an ebook or an online course. Prompting users to get that product, or a sample, by email can help you grow a list.
3) Offer Discounts, Freebies, Giveaways, etc.: Most people on the internet keep on looking for freebies. By offering some on your website, you can get the email address of website visitors who are interested in getting more.
Some other ways include using lead magnets, advertisements, online promotional events, social media posts, etc.
Now, what to use and when depends on the person. You can find many ways of growing lists, but the reason for all those ways not giving the best results is the lack of an individual’s understanding of which methods make the most sense for their brand, customer base, and products. Using all the ways at once would take a lot of effort and time. Above all, the average beginner marketer’s email list building budget is pretty small, and some of these methods do cost money to make them work anywhere close to their full potential, depending on the niche.
For beginners to list building, like me, List Warrior is one of the most powerful tools I ever invested in to overcome the initial hurdle of building an email list. It teaches something simple, but powerful, reliable, and still lesser-known, to build a list.
I have come to know a lot of new ways from that. Though it would not be as cheap as a shoestring, at the price of a coffee mug, it offers thousands of dollars worth of value. My experience with that has been outstanding so far. So my recommendation for a growing email list would be List Warrior. I would suggest you read my review post on that.
In the end, I would suggest you be picky while choosing a shoestring budget for anything online. On a lighter note, sometimes the cheap ones do not tie a knot properly. In a nutshell, select a technique for email list building wisely. Test multiple things, and find something worth pouring at least a small amount of money into, and do so gradually.
Please feel free to reply to me, if you need more information on that post or any of the points discussed above.
Good Luck!
Thanks,
Cleo