Hi Joe.
You'll also need to allow for Stamp Duty and legal costs. Also the Ltd Co will need to raise funds to buy the properties (either a director's loan from you, or mortgage in name of Ltd Co, etc.).
Ltd Co is not generally cheaper for BTL properties. It's better suited to BTS, and perhaps when you have a large BTL portfolio (50 or more properties).
Ltd Co is also useful if you are trying to shield your assets from other greedy parteis (eg ex-wife!).
Bear in mind that the Ltd Co will cost you around £3k per annum in accountancy costs.
Before you do anything... seek the expert advice of an accountant specialising in property taxation.
Have fun,
Alan
Alan O
Ethical BMV SARB Investor