Development finance is available for multi unit residential construction with low doc lenders. You will need to contribute at least 20% of the cost of the project.
The land purchase will be a separate loan to the construction loan. During the construction phase the interest will need to be paid. Interest costs can be capitalised if the properties are expected to be sold at the end of the development.
Some lenders may require pre-sales of one or more units depending on the number of units in the development.