First up CCMS that has replied is a Registered Migration Agent, in almost every case on Australian migration, his advise or comments will trump any of us others comments and all RMA's on this forum supply their RMA info below their comments.
Many countries have a few extra things to beware about prior to an application, but most of the basics are the same as it is within legal limits.
* First you have been asked to answer some questions from a member that seems to have local knowledge and was liked by a member I know has that knowledge - so answer those questions (is my advice).
* It also helps to give a basic relationship time line that includes any online meeting and personal meeting and any contact since first meeting. Bullet point is fine and makes for easy reply.
*Any other info such as travel, kids, property ownership, education and employment can also help - no details are required but can lead to options.
* Lastly it is not a simple, short or cheap task, so get prepared for that and lots of homework.