Single unit residential properties are a very popular choice for first time investors, they tend to have manageable price points and it is easy to maintain these properties. Condos tend to have the lowest purchase price and least amount of maintenance required, however, there are additional costs such as strata fees.
A single family home has a higher price point, but this means it would also have a higher equity gain over time. There may be more maintenance required with a single family home, but the financial benefits are definitely worth consideration.