There is a slight chance that i will get a new 55g tank and got question?

Don't add the shrimp, they will be dinner if you do. Don't add any betta's to the tank. You could chance it but it might end with dead fish. The bala sharks are gonna get very large. They need lots of room. You can get a pleco, some are very beautiful and don't get as large. Try to only keep 5 or so fry. They are gonna multiply like crazy. Why do you have betta's in a bowl? They need more room than a small bowl. Betta'a also need a heater and filter in a 5 gallon tank.