Justification of the need for an in-memory database

Question

My use case is as follows --
I have a database table with around 1000+ entries and this table is updated/edited infrequently but i expect this to change in future. Some of the columns in the table contain strings that are of considerable length.
Now I am in the process of writing a UI application that will have some mouseover events that will display texts derived from the aforementioned database table.

I have, for my use case, decided to write a backend 'server' that will host an in-memory database that will have all the data that was present in the aforementioned table. The UI app will now, on startup, cache the required data from the in-memory database present or hosted by the backend server.

Does my use case justify using an in-memory database ?
If not, what are the alternatives I should consider ?

EDIT 1 -- My use case also involves running multiple searches of varying complexity on the database very frequently.

Thanks
p1ng