How many accounts can I have set to home on a single console

First of all, keep in mind that buying/selling accounts is a violation of the terms of service so you are putting yourself at risk for being banned for purchasing accounts.

Otherwise, the limit is not exactly known. I've heard at least 6, but also heard it can be about 32 or 33.

Thank you! I didn't know it was against the terms of service

Sorry to hear you're having trouble. However, please be aware that the buying and selling of gamertags is not allowed on Xbox Live. The fact that you're doing so and admit to it leaves your console and affected gamertags at risk of being permanently banned
from Xbox Live.

I'd like to think that you'd end up saving more money buying the Xbox Game Pass or purchasing the games yourself instead of trying to game the system.

This is incorrect I guarantee you that I can set multiple accounts as home console on a single console., and I'm aware that I have five switches every 365 days that was not my question.

My question is how many until I get the error message that I can no longer set any more home consoles to this Xbox.

How many different accounts have your console set as their home console? There is a limit to how many can have set to one console.

When your account is logged in, are the other accounts on it able to access your games?