Hi All,

Sorry if these are obvious questions, but I just wanted to make sure before I start to put time into the build.

I am migrating an existing custom built non-cms site over to umbraco 9. So far so good with all the basic stuff, but we are now about to start work on migrating the existing members and their profiles over to become umbraco members.

My questions are:

• If I need more advanced profile attributes than strings, numbers, images etc... should I start creating "document types" to represent these objects and assign them to members using blocklists? My actual examples are a little complicated to explain, but as a basic example, say each member has one or more "Cars" that are unique to them. Each car having a model, colour, weight, engine capacity etc... Should I create a "Car" element document type and add a blocklist property to the member type that contains a list of cars? I ask because I wonder are there any implications of linking member types and document types in this way (caching, data retrieval, publishing etc).

• The existing site I am migrating has over 300k members and is growing every year. In a few years it could be >500k. I'm pretty sure Umbraco can handle this number of members as I have read on other discussions. But would this number of members have any issues if I extend the member types in the way described above?

Many thanks for any help you can offer