Multiple domains, one webserver

Hello, I have a lot of Instagram accounts and I want to put links in my bio as soon as I have enough followers. I thought about setting up some WordPress instances on one webserver and buy some cheap domains ($1/year) which redirect to the specific instances. For example valentinesdayblabla.info redirects to webserver/valentinesday, superbowlblabla.info redirects to webserver/superbowlprodcuts etc. Do you think this is bad practice since I only want some follwers to click my ref link? I don't want to put SEO effort in it and don't want to rank it. Thanks in advance.