Three S19 for 1750 total or for each. I’m not familiar with what you are calling hosting. What does that mean. If you can use the heat for a purpose then you are much better off.

Last time I looked seriously at mining my observations were you should ask yourself if you can mine a bitcoin for less than you can buy it on an exchange . You are buying it either way, once through electricity and hardware and time and risk the other through trading currency. When I looked at it before it seemed cheaper to just buy it. But if you want no kyc and or you just want to learn something these can be added to what value you are going to get out of it that may make it worth it. I have an s9 I will still run as a space heater this winter.