sounds good

it sounds a bit harsh, but the ghost shrimp are only 25 cents where i am, and the store will probably not actually count how many you get so you'll get a few extra, so it's worth a shot to see if your betta will handle them
for the otos, just a warning in advance about 99% of them are still wild caught, and the practices used to catch them can be questionable. also, they dont eat anything green (algae, veggies, plants, etc) from the time they're caught until they arrive in your tank (unless the LFS ensures that they eat) and that amount of time causes a bacteria in their stomachs to die off, meaning that there is a good chance of them starving to death. the majority of otos die within the first month, but if you can get them to live longer than that they'll generally live for years.