You can buy it in the form of an LLC if you would like. However, I wouldn't worry too much if its your first and only investment so far (plus it may be harder to qualify for the more attractive loans if its a coporate purchaser).

By the way I assume you are purchasing a residential property. If you are buying a large commercial property, definitely set up a LLC or something similar.

As far as downpayment goes, I highly doubt a traditional bank will give you a "small business loan" for the down payment. However, the loan markets are still very borrower-friendly. You should be able to find 100% financing in some form (probably a 80% first mortgage, 20% mortgage).

If you buy in your own name as a rental, you will be still be able to write off expenses associated with the operation of the property.

Also, make sure you do your homework on your deals. Alot of stupid things are going on out there. In my area, its almost impossible to find a deal that makes sense (especially as a rental) unless its an off-market acquisition.

Good luck!