Yes, there are many Canadians still buying in Miami. Actually, Canadians are on the top of the list of nationals buying in Miami area.
The $30,000 you mention is your budget to buy a condo or to pay for closing costs? There are no condos for $30,000 in Miami Beach or surrounding that I know of. You may find in much further areas.
But if this is not your budget than the closing costs will vary according to the cost of the condo. If you are buying cash, you are avoiding some loan fees. It is really difficult to tell not knowing your budget.
When buying a condo here in Miami make sure you have a good Realtor (I will be more than happy to represent you by the way), so he/she can show you properties that will match your needs (low maintenance, easy rental restrictions, best areas to buy etc...)
Please contact me if you need further assistance.
I love Canada by the way. Lived in Oakville, Ontario for about 6 months.
The Campins Co.