I apologize in advance if this question is irrelevant. I am a newbie...
Over the last few months, I've become increasingly interested in this form of bicycle.
There are a couple of questions I would like to ask if possible.

1. Is concerning frame size. At the moment I'm riding a 17" rigid mtb which I find very comfortable. So my question is would a 17" fat bike be comparable to a 17" Mtb. I know that many of you will say that I will need to try one. But if the frame sizes compare it will give me a starting point.

2. What would you expect to pay for an entry-level machine. I have a budget of £600 at the moment. I would also prefer an aluminum frame.

I did ask a question on fat bike frame sizing in the Mtb section but have had no response so far.
If these are questions that members of this forum cannot answer, perhaps you would know a forum that may be able to help.
Many thanks in advance.