Autocomplete to show categories (or results for federated search)

Hello! I want to achieve this

I have 3 indices, Houses, Neighborhoods and Floorplans

I understand that this is a federated search that I need?

The other problem is that I show these results in 3 tabs. (Suppose that I search for “Ocean”, so I want to find all Neighborhoods, Floorplans and Houses with “Ocean” searchable attribute somewhere).

I show the results in 3 different wrappers, and I think this is wrong?
Should I use 1 query with federated search?

I understand that the Autocomplete is different from InstantSearch so these would be two different questions.