I suggest if you already have a established niche page, then what you could do is create a shopify store,
create shirts/sweatshirts/phonecases related to your accounts niche,
i recommend using "printful.com" I've heard nothing but good things about these guys, and their system seems to be perfect for dropshipping, to my understanding if someone buys something from your shopify store, they will auto subtract the cost of product from your paypal, print, and ship the item to customer.
For your store, Create a email opt-in for retargetting and plugging offers, add a countdown timer to create scarcity, make up some social proof and put it at the top of the website under the logo, add the plug-in that allows customers to see when someone purchases something on the site "i forget what its called"
The goal to keep your brand from dying is to build an email list to plug new offers, and upsell.
Now that you have your shopify store created and linked to printful, pay someone on fiverr to create high quality designs for you, this way when it goes through printful, the designs don't come out looking like shit, you can find people to do this for fairly cheap, the market is pretty saturated, you're looking at $5-25 per logo/design.
When you have that all set up, this next step will boost your traffic to your main page, and website a lot. (however don't abuse it, because it will become obvious)
Mother IG (main acct 81k followers) - Posting content related to niche, every 3-5 images plugging your brand store.
5-15 Slave IG's ( these accounts plug your main IG account) - posting and reposting content related to your main page, tagging your main page in the post, and/or caption
With the slave accounts you can run these fully automated, I'm going to use exaggerated numbers for the example.
15 slave accounts, following/uf : 1000/day
comment : 600/day
lkes :1000/day
Interactions with users per day : 2600 x 15 = 39000
We will assume 5% engage and follow mother account. = 1950 users/day
and assume of those 1950 users 2% of them interact with your store = 39
and of those 39 people that interact with your store 20% buy something worth $20 = 8
and of those 8 users, they purchased something $20 or more = $160+/day (then factor in cost of product)
note, people usually purchase more than one item, tshirt and a sweatshit, or two tshirts, or a tshirt and phone case ect..
100% organic traffic.
and now that you have these buyers emails, factor 10% of those buyers will actually purchase something again in the future so their long term value will increase.
Then what you could do is take a % of your daily profit, and invest in paid advertising which that will be something for the future.
Goodluck!
The numbers are all scaling based on how many accounts you use, and how much effort you put into keeping those accounts updated and running without bans, there are people on here that run hundreds of accounts pulling traffic to offers, which is no different that mother/slave setup. You may want to consider creating multiple mother pages.