I'd have to disagree.
1. You can get a loan straightaway for a new ltd company, I did it. I set up the company account with the same bank as my sole trader account. They have your actual banking history, not a credit check history. If all has been fine with your sole trader account, you will not have a problem getting a loan. I had £15,000 within 4 weeks of being ltd.
2. I don't have a clue.
3. Accountancy fees WILL increase as there is more paperwork their end, not a great deal though.