There are plenty of vendors who support Free software. They will install Free software and configure Free Software and provide whatever level of training is required for Free software. What they don't do is provide that value for free.
The difference between Free software and non-Free software is not that there is no training involved. It is that if you purchase Free software you end up with Free software, and if you purchase non-Free software, you end up with non-Free software. That's it.
Oh, and if someone decides they want to cut costs by not paying for something of value that they need, they will get what they paid for. That's orthogonal to the liberty of the underlying software.