Great to learn that you have found something that you have been hunting for years.
Trading Banks offer some of the best rates for residential / commercial Property Loans. So using equity for your home as security and finance from the bank would probably be a much cheaper option compared to the non-bank finance.
There is also second-tier lending via the likes of Solicitors’ nominee companies and private lenders, however these will be more costly to service due to higher interest rates and lending up to 70% of a current Registered Valuation. They are often shorter term, 1 to 5 years, and may be interest only. In our experience, we do find that some customers, who struggle to meet all the conditions when dealing with a bank, want to work with a more hands on Non-Bank lender with greater flexibility and less hoops to jump through.
It certainly pays to shop the options to find a deal that best suits your situation and investment / business strategy. It is also important to seek the advice of an accountant to ensure the property is purchased under the best structure.
Wish you all the very best out of this opportunity.