>>406875236
If you're gonna stick with a cheap headset and don't have the money to upgrade at all, SlimeVR is a nice solution.
It has major drawbacks, and is a bitch to set up, but if you're thirsty for FBT it's a great cheap solution for us poverty anons.
I made my own following their documentation for around 100 dollars, feet knees hips and chest. The trackers they sell to you won't ship til fucking May currently. 
The trackers are not perfect by any means, but their current beta app allows for improved tracking while taking care of issues like clipping through the floor and like 90% of sliding that had made it look so much worse compared to vive trackers. 
That being said, if you can afford an index and vive trackers, buy them instead. It's a lot less hassle and a lot less cope in the long run, unless you're absolutely broke or NEED to be under the blanket in FBT.
This webm was recorded after hours and hours of painful troubleshooting and homicidal thoughts. Do yourself a favor and save up for the real deal, lol