First talk to walter, boast or talk about either fishing or gardening and if you say fishing he will give you 200 simolians if you can give him a trout.(you may have to talk multiple times.)if you say gardening he will give you 50 if you can give him a bell pepper.
Note: both of these can be used multiple times.
Hope I helped.
Update: you can also chat chat to kia and she will give you 50 simolians if you slap ruth for her.