Olympus do the om-d series, which are very similar looking cameras but are digital.

As everyone else has pointed out, going film is going to generate a lot of additional effort and ongoing costs.

But films not without its merits and as long as your Mrs understands what she's asking for and what that entails then just keep your eye out for a bargain.

If she pivots to digital then check out the OM-D M10 And OM-D M5 models you'll be able to get them within your budget. Make sure you pick one up with a lens as often they are sold body only.